Getting to know SPQuery

Here are some examples and details around the new enhancements for 2010 (Joins and ProjectedFields)…

http://www.learningsharepoint.com/2010/07/18/spquery-in-sharepoint-2010-tutorial/

SharePoint 2010 – Microsoft.SharePoint Namespace

If you’re going to code against SharePoint you should take a look at all that is available to you…

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.aspx

View all tasks across all site collections

This is a great approach to pull all tasks from all site collections and display in one spot…

http://kjellsj.blogspot.com/2010/08/my-tasks-web-part-search-driven-cross.html

Custom Web Part that sends an email

Here’s a link to a custom web part that shows how to send an email using SharePoint’s SPUtility.SendEmail() function.

http://www.codeproject.com/KB/sharepoint/SharepointContactForm.aspx

Start Building your own Web Parts.

This is a good example of a simple custom web part. It has the basic code to get your head wrapped around the process…

http://www.fivenumber.com/custom-webpart-inserts-items-into-sharepoint-custom-list/

This link gives you the how-to around deploying your custom web part…

http://msdn.microsoft.com/en-us/library/ms415817(v=office.14).aspx