I have supported Windows Live Messenger, since they started beta tests i was one of the first to be invitied since i got connections with someone who works for microsoft =D
I used to have combination too (MSN Messenger 7.5 + MSN Plus) but still, MSN 8.0 BETA is still better. So far, I had no bugs. Me too, but they keep updating it the version, clearing out bugs everytime.