If you have MSDN Subscription, you can download VS 2010 RC now.
1. Important to note is that VS RC will not support Silverlight 4 Beta so if you are working on Silverlight 4 development then you should keep VS 2010 Beta only.
2. I’m not able to install it in my office machine. The installation dialog will be disappeared without any message or error after clicking “Install” button. I got this message “[02/09/10,15:45:44] vs70uimgr:  UI Thread exiting with error code: -2147172341.” in dd_error_vs_vstscore_100.txt log file. I don’t have any solution for that now. I will update you guys once I found something on this issue.