I previously posted a set of links to download various editions of Visual Studio 2008 beta 2. Most of those links point to very large DVD images that can be problematic to download due to their large sizes. There is a community technology preview (CTP) available of a peer-assisted download manager that can be used as an alternative download mechanism for VS 2008 beta 2.
If you have not yet downloaded VS 2008 beta 2 and/or you are having trouble downloading it from the links that point directly to the DVD ISO images, I encourage you to try out the July CTP of the Microsoft Secure Content Downloader. You can find more information and a download link at http://www.microsoft.com/downloads/details.aspx?FamilyID=9a927cf6-16e4-4e21-9608-77f06d2156bb.