Joel:

you could run media converters for it (www.transition.com is what I use).

Thank you for all the WONDERFUL feedback. Just to answer some questions.. for those that are curious. - Why DS3/Coax? Because room in this POP (a ROHN Building) is really really tight, and they said if we brought it in Coax, and plugged almost directly in we could do it (semi-cheap, fast and easy). - We'll run 2 pair of coax, and 4/6 pair of fiber, but currently there is no room or approval to properly terminate fiber.. (a nice shelf, etc..) that may change on actual install.. using some small stand alone media converters (like the transitions) may allow us to do it. - Why do it? Because our property is contiguous with the Sprint POP next door.. and I need to say Mega-Kudos to Sprint for being willing to let a small ISP like us do this for a DS3 upstream and being decent to work with so far..