The difference between Site Master Page and System Master Page

Site Master Page: The site master page will be used by all publishing pages.
System Master Page: Use the system master page for all forms and view pages in this site.

Look at the Page directive in master page, MasterPageFile setting that will usually be one of the following:
"~masterurl/default.master" means the page is using the system master page
"~masterurl/custom.master" means the page is using the site master page

Refer:http://msdn2.microsoft.com/en-us/library/ms476046.aspx

How to create a custom e-mail alert handler in Microsoft Office SharePoint Server

To customize the email alerts sent from SharePoint we need to intercept the e-mail alert and modify it using IAlertNotificationHandler interface.

Refer to the below URL
http://support.microsoft.com/kb/948321/en-us

Debugging Custom Timer Jobs

You can debug timer jobs by using Visual Studio just as you would any other managed application. Timer jobs are executed by a special Windows service that is set up on the server when you install Windows SharePoint Services: the Windows SharePoint Services Timer. This service triggers the executable Owstimer.exe. You must attach to this process to debug custom timer jobs.

Rename discussion board reply link name

How to rename the reply link 'Reply' to 'Comments' in the Discussion board (MOSS 2007)?

1. Open the Schema.xml from 12\Templates\Features\DiscussionsList\Discuss

2. Locate ReplyNoGif field

3. Check the resource file mapped to the field and update the value of resource name ReplyLinkText as 'Comments'.

4. Save

Webpart connection

Webpart connections menu will list all the webparts in the page that uses the same Interface.

Features of Sharepoint

Check the Capabilities of MOSS
http://www.microsoft.com/sharepoint/capabilities/default.mspx

What is Sharepoint Server
http://www.microsoft.com/sharepoint/prodinfo/what.mspx

Product Comparision Chart
http://download.microsoft.com/download/1/d/c/1dc632e8-71e1-466f-8a2f-c940f1438e0a/SharePointProductsComparison.xls
This Excel file will give you an idea of the features MOSS support

- Syndication (RSS and ATOM) - Yes and Inbuilt support for RSS and how to Manage RSS
http://office.microsoft.com/en-us/sharepointserver/HA100214251033.aspx
- Support to Web Clipping - Yes
- Implement different kinds ok workflows, for example to approve some content update and this has to be approved - Supported

You can use Inbuilt Workflows or Create Custom Workflow using Sharpoint Designer / Visual Studio

see Developer Introduction to Workflows for Windows SharePoint Services 3.0 and SharePoint Server 2007
http://msdn.microsoft.com/en-us/library/aa830816.aspx

- Support for most know Web Browser (Is there any identified problem with anyone)
See - http://www.andrewconnell.com/blog/archive/2006/05/17/3115.aspx and http://technet.microsoft.com/en-us/library/cc263526.aspx

- In-Built Statics
http://technet.microsoft.com/en-us/library/cc262541.aspx
and You can Use Sharepoint Designer for Site Statistics ( Sharepoint Designer is Free Now www.microsoft.com/spd )

http://office.microsoft.com/en-us/sharepointdesigner/HA101741361033.aspx and here http://www.bluedoglimited.com/SharePointThoughts/ViewPost.aspx?ID=129
- autoeliminate bot traffic

- integrate easily custom security (any experience with this)
http://technet.microsoft.com/en-us/library/cc262331.aspx

- Taxonomy support for searching within sharepoint
http://blogs.msdn.com/ecm/archive/2007/01/22/taxonomy-tagging-starter-kit-for-sharepoint-server.aspxhttp://www.mindsharpblogs.com/bill/archive/2006/07/06/1196.aspx

- Metadata management
Managing Enterprise Metadata with Content Types -
http://go.microsoft.com/fwlink/?LinkId=101604&clcid=0x409


To Know More Check this Link
http://sharepoint.microsoft.com/blogs/GetThePoint/default.aspx
and this site discuss these features

Branding
Building Solutions
Business Intelligence
Business Processes
Calendaring
Collaboration
Compliance
Design
Education
Feedback
Lists and Libraries
People Wrangling
Planning & Process
Productivity
Publishing
Search
Site Admin
Social Networking
Team Sites
Training
Web Parts

--Source,
blog

2007 Microsoft Office System – Learning Portal

The Microsoft Office Online Web site hosts additional learning resources for the 2007 Microsoft Office system, as well as templates, job-aids, special offers, and links to a community of Office users that you can participate in to extend your productivity.
http://www.microsoft.com/learning/office2007/default.mspx

http://go.microsoft.com/fwlink/?linkid=66672&clcid=0x409

http://go.microsoft.com/fwlink/?LinkId=67626

http://go.microsoft.com/fwlink/?linkid=67705&clcid=0x409

http://go.microsoft.com/fwlink/?linkid=67721&clcid=0x409

http://go.microsoft.com/fwlink/?linkid=67722&clcid=0x409

http://go.microsoft.com/fwlink/?linkid=67720&clcid=0x409