Most blue screens are caused by driver problems.  You might check 
Windows Update for newer network drivers, which would be the most likely 
source of your problem.  Other likely trouble-makers are third-party 
software programs that insert themselves into your network stack (Such 
as the Cisco VPN Client, or virtualization software like VMWare 
Workstation.  Personally I got a barrage of BSODs after installing 
VMWare Workstation 6.5.)

And now the obligatory beta software comment:
It's beta software, what do you expect?

-Greg

Kor Kiley wrote:
> Anyone out there testing Win 7.  Have you had any blue screen 
> problems?  My system is crashing whenever I connect to a samba share.  
> It's happened connecting through the campus samba server as well as 
> through one of our library samba servers.
>
> Kor Kiley
> Library Systems