When you want create an AJAX enabled web application or web site within VS 2008 targeting .NET 2.0, you will find that the corresponding templates missing. This
This could be frustrated for some of us who want to utilize the new features of the new IDE but still want spend much more time in deploying the 3.5 fx.
As mentioned by Brad Abrams, ms has just released these templates. Check it out? Or you can download these templates from this link.