Microsoft has released the last and final version of CTP for the Visual studio Extension for Visual Studio 2008. you can hear more about the release here
You can also read about the new features in the release notes
You can also check out the hands on labs and training videos at MSSharePointDeveloper.com.
The Release To Web (RTW) of VSeWSS 1.3 is expected in July 2009 and we are not planning any further CTP releases.
If you want even more info about VSeWSS you can learn Sharepoint Developer Best Practices direct from Microsoft Patterns and Practices published November 2008 here.