Just wanted to add my $0.02 about i386/amd64 ...
I recently upgraded my box to 3 x 1TB drives and wanted to use ZFS on them, but ZFS does not like i386, well maybe in triangle with kernel panic ...
I was 'scared' about flash and wine on amd64, but after installing amd64 I am very positively surprised.
Flash works without any problem in amd64, even the installation methond is the same (all ports/packages with f10), VirtualBox works as usual, even wine installation is posible without much trouble.
Workspaces switching on my window manager seems little more snappy (dunno why ...), ZFS works as desired, does not panics at unixbench benchmark (I only limited ARC to 128M).
I need to try amd64 on my laptop, suspend to ram should be working on amd64 with SMP ...