SP1 has been available since the 12th December 2004:
http://www.microsoft.com/downloads/details.aspx?FamilyID=b07c9ef0-265a-4237-ae3b-25bc8937d40f&displaylang=en

It certainly makes virtual machines start faster and feel more snappy. Before upgrading remember
to shut down all your virtual machines first otherwise they may not work after
installing SP1.

A personal VPC bugbear was using VPC over RDP – the mouse was out of sync. Many newsgroup
postings recommended all sorts of ideas relating to video card hardware acceleration.
Well today I finally installed Virtual Machine Additions which solved the issue. The
Machine Additions are on VPC’s action menu and is installed to virtual machines, not
the client that runs VPC.

RDP and VPC is a great combo. Buying one of those thin
client PC’s and moving this noisy (but fast) 64Bit box to my server ‘room’ is
getting more tempting now I can use VPC over RDP.