Yes they are all there on the download center right now ! You can download any SKU of your choice and I noticed there are VPC Images also available for a few SKUs.
You can use this link to get you to the downloads. Click Here !
To Recap, there are lots of new features for Device Developers in Visual Studio 2008.
You can write unit tests for your device applications the same you have been doing for web and desktop applications. Build applications using both .NETCF 2.0 and .NETCF 3.5 from the same tool. Write some cool remote tools using our Managed APIs for CoreCon.
We'll wait to hear about your experiences with Visual Studio 2008 when developing for devices. You can leave a feedback here on this blog or you can use http://connect.microsoft.com/ to log any bugs or suggestions.
Thank You !