Kirk has got a great series on Sharepoint for the developers on his blog here. There is a whole wealth of information there and I am book-marking it here for my own reference as well. Great work, Kirk ! You rock !

1. SharePoint Developer Series Part 1: Introducing VSeWSS 1.3
2. Consuming SharePoint Lists via AJAX
3. SharePoint for Developers Part 3 – Expression Blend and Silverlight / Channel9
4. SharePoint for Developers Part 4 – Consuming SharePoint Web Services from Silverlight
5. SharePoint for Developers Part 5 – Columns, Content Types, and Lists
6. SharePoint for Developers Part 6 – Custom web services / Channel9
7. Getting XML Data From a SharePoint List – The Easy Way

And knowing him, he would probably have a lot more to follow as well. Dont walk. Run.