When using the 270.18 beta driver in the host OS (in my case, Arch Linux), if you start Windows 7 as the guest in VMware Workstation (7.1.3 here), VMware will lock up towards the end of the login process. This is probably only if Aero is enabled, but perhaps not.
Using the 260.19.36 driver fixes the issue.
There's nothing in the NVIDIA or VMware logs that is helpful or remotely related, but I use an NVIDIA GeForce 9600 GT 512MB video card (64-bit OS).
As a side note, I found others with this same issue and workaround: https://bugs.launchpad.net/ubuntu/+s...rs/+bug/709331