I've been waiting for almost a month for my new DELL M4400 and I got it yesterday. Within some 30 minutes of "getting started" procedures, I got 3 different blue screens, several "recovery from an unexpected reboot error" Vista dialogs and (most annoying of all) audio/sound stuttering problem which gets on my nerves. There are some other minor issues as well, but I can live with those.

I called the "pro support" which we pay extra for, and that guy was not aware of any audio stuttering problems with the M4400... amazing, Let Me Google It For You. It's been known for months now, but DELL keeps selling it anyway. I hate that. The poor support guy talked to a friend for 5 minutes, came back with a sigh and told me he had to get back to me on this one because there is no simple fix for this. I knew that already, that's why I called them :)

Still not a word from him, but the day is not yet over.

I've made a backup on my HomeServer now, and also downloaded the 64-bit Windows 7 beta from MSDN Subscriptions. I've read that some M4400 users have successfully installed Win 7 on their machines and everything runs just fine. I'll first try whatever the support guy suggests, then go for Win 7 and see how that works out.