Borderlands is a great game up to the final boss... all I'm gonna say is what many others out on the web have said. The ending is lame.
BTW I found that black screen issue with Borderlands was due to dual monitors and graphics driver. For me at least, when it would happen to me apon first launch, if I'd disable my 2nd monitor before launching it then it would run fine. Once I get in and set the resolution and stuff I wouldnt see the issue after that even with the 2nd monitor enabled.