I've been running Win7 for a few months and haven't seen a BSOD or even any lockups. I haven't had any compatiblity problems with consumer programs but have had to upgrade work apps (Oracle, soft phone, etc...). Office, Access, Visio, etc... have run just fine. The only drivers I had to download manually were Lenovo drivers which now have published Win7 drivers.
I love the integrated search function and am looking forward to enterprise virtualization for apps and network connections.