Parallels Support Forums: Nope, Not There Either
With Parallels 3.0 crashing like Mr Magoo in bumper cars and no other responses from the Parallels folks I figured I’d head into their support forums and post my results, including crash logs, there since I can make Parallels 3.0 seg fault almost at will.
I own Parallels, I have a support forum account, but trying to post gets me:

People at Parallels come on, enough already. It’s like you want your users to dislike you.
I swear, not even Microsoft makes it this difficult to help them. Throw a dog a bone and open up at least one line of communication.
Update: After poking about with Parallels for a couple hours I am now largely confident the problem with 4128 is its audio support. Just before a crash or kernel panic the audio cuts out. It appears that disabling the audio playback in the resident Windows application provides a measure of stability (I haven’t crashed in about three hours of constant use thus far) so this probably means no games for the time being and if your apps play any sounds at all I’d disable them in that app’s preferences.