No recent updates huh?
Well, my system:
1, Maxtor 160Gb, for Page Files, User Data, Installed Programs for all 4 OS's. Single program installations w/shortcuts pinned to each OS Taskbar
1, Maxtor 160Gb, Windows Vista SP2 x86
1, Seagate 250Gb, Windows Vista x64
1, Seagate 320Gb, Windows 7 x86
1, Seagate 320Gb, Windows 7 x64
And I run Windows Xp in VMWare
And everything is running great