No hard-drive wipe needed for Solaris x64 support!
Someone sent me this link
about the
new 64-bit Windows XP. There's some interesting text on that page I
would like to quote here (assuming the link doesn't
change...):
I can tell you with confidence that if you go from Solaris 9 on x86 to
Solaris 10 with both x86 and x64, you will NOT have to erase your hard drive
(assuming you've enough room for the new x64-native binaries, and you
probably do already if you're in possession of an x64-capable box).