Look Ma, No More PLKs!
For those of you trying out Visual Studio 2010 Beta 1, you may have already noticed... But, Visual Studio 2010 no longer requires you to create Package Load Keys (PLKs) for writing and deploying VSPackage extensions to VS. This will probably come with some fanfare by those of you who've had trouble with PLKs, or getting your packages to load because of them, or never understood why they were needed anyway.
The requirement for Shell Load Keys (SLKs) has also been removed, so you can create new isolated shells without them.
For those of you who have no idea what PLKs/SLKs are, then no need to worry... :)