If you've got Power Kernel installed, you can use the root terminal mode to see if you can't manually repair it.

To be honest, though, I'd just buy another; you need a USB port to do much of anything here.

I'd also look into various repair methods - There's some USB test pins under the battery that can be soldered to for a functional USB port(disadvantage is that there's less ESD protection on those pins, but there is /enough/). You can also contact Estel about re-soldering the port for you, but it'll cost a significant amount(though way less than a new N900).