The problems I've had with SP2 aren't the installation. We run java-based application servers to a gui-based graphical front-end for banking databases, and SP2 will not leave that application alone unless the new firewall is disabled. I've stopped loading SP2 and am instead looking to extend Citrix to each desktop.
The new citrix is awsome :) i use the client on my ipaq to get stuff done on the server without goin over there..
You can disable the new firewall via group policy so that everyone on the network leaves it off.