Thanks for the help. You are right about it being a driver issue. I suspect it has to do with the Atheros wireless NIC on my MacBook, for smb connections over the Ethernet port are fine.
I have 32-bit Win 7 installed on a 2.0Ghz black MacBook. Thanks to Dennis, I've been able to connect to my Mac Mini share via smb. After less than 2 minutes of connecting to the smb share, however, Win 7 will BSOD with an IRQ error. This only happens if I open a smb connection to my Mac...