Send Email using SharePoint Object Model

You can send email using sharepoint object model, Here is the trick

SPUtility.SendEmail(SPContext.Current.Web, false, false,"to-address@mail.com", "E-mail title","E-mail body");

SPPersistedObject - Custom SharePoint Storage

Using SPPersistedObject, you can presist objects in database. It is similar to Property Bags. And aslo it has excellent feature ie., specify at what level the object should be presisted. for example, Farm level or Web Application level etc...

WSS Search across SiteCollection : Search Server Express 2008

By default in WSS, you cannot search across site collections without having MOSS features. for example, from Sales Site Collection you cannot search data in Marketing Site Collection.

By using Microsoft has released Search Server Express 2008 we can search across multiple site collections by without using MOSS features. Search Server Express 2008 is a free product from Microsoft.

for more information http://www.microsoft.com/enterprisesearch/serverproducts/searchserverexpress/default.aspx

Limited Access Permission

The Limited Access permission level is designed to be combined with fine-grained permissions to give users access to a specific list, document library, item, or document, without giving them access to the entire site. However, to access a list or library, for example, a user must have permission to open the parent Web site and read shared data such as the theme and navigation bars of the Web site. The Limited Access permission level cannot be customized or deleted.

NOTE You cannot assign this permission level to users or SharePoint groups. Instead, Windows SharePoint Services 3.0 automatically assigns this permission level to users and SharePoint groups when you grant them access to an object on your site that requires that they have access to a higher level object on which they do not have permissions. For example, if you grant users access to an item in a list and they do not have access to the list itself, Windows SharePoint Services 3.0 automatically grants them Limited Access on the list, and also the site, if needed.

An external storage API is available for WSS 3.0

Store SharePoint data in external device other than SQL Server
Follow this link to know more http://support.microsoft.com/kb/938499/

SharePoint Versioning

Versioning enables you to track and restore the changes in SharePoint List items and files Document Library.

Major and Minor Versions
Libraries can track both Major and Minor Version. Major Version is used when new section is added and Minor version is used when spelling error is corrected.
Lists can track only major versions.
You can limit the number of versions for List and Libraries that people can Store.

Versions are created when,

• list item or file is created or when file is uploaded
• Same file is uploaded again, enable checkbox to create new version
• Properties of list item or file is changed
• Open, edit and click save(for first time).
• File Checked Out, Changed and Checked In