In the VM: 2GB RAM 40GB HD (Expandable) 1 CPU Win XP Use: Solely Office 2010 Temps recorded so far (install's status reads it has another 20 minutes or so to go): 42C idle, up to 61C while installing, frequently ends up being 55~56C, going back down to 42 and then 58~61 then back to 56 then 42 then 53 and so on. (I'm tallying manually... no way to precisely log, but it spiked to 61C only twice.) I have SMCFanStatus set to run both fans at 4000RPM and am keeping a close eye on it, should the CPU get to 70 or higher. (70 is still a fairly low temp, especially as my token Sony quad laptop gets up to 76C when playing UT2004; 80C when doing UT2004 and Prime95 for an hour.) When installing Office later, I'll keep the RPM at 3000 and see how warm it gets. When actually using Office, post-installs, I'll go back to default 2000RPM and see how warm it gets. Even at 4000RPM, this runs fairly quiet. There's a bit of noise at the max allowable level (5500) but it's by no means noisy at that point either. I wonder if the low-end GPU is running; there is no need for the 6750M to kick in yet, but I did enable 3D acceleration and allow the VM to use 256MB RAM. When installing the guest additions prior to Office's install, that'll reveal more info down the road but, so far, the temps I'm seeing are rather good. It just rebooted and is now applying my personal settings and with the Parallels Tools additions (the final lap of the install). Temp reads 42~45C, 4000RPM fan speed. More to follow later today. Has anybody else used a VM in the 2011 MBP? If so, please share - especially temperature information!