geared to fixied options
No EBB, vertical dropouts, and 130mm spacing in the rear. You have a few options. Here they are, from worst to best, and most likely cheapest to most expensive.

 Ghost ring. Basically, you get your chain length as close as you can then cram an old chainring in the chain inside the chainstay. Scary solution, especially if you don't run (all of your) brakes.
Magic Gear. Find a gear combination and chain length that gets the chain respectably tight. May require halflinks, and can be a PITA. If if works, it works great for a short time, then the drivetrain wears and the chain becomes loose and you have to do it all over again. Not a great permanent solution.
White Industries ENO eccentric rear hub. This is the way to go if you're willing to spend the cash. Comes in a variety of spacing, free or fixed threading. Works basically the same way an Eccentric Bottom Bracket does. Dropout bolts are offset from the axle so it allows you to adjust the distance from the bottom bracket to the rear axle. White Industries makes bombproof components as well.



My recommendation is the ENO, hands down. Don't bother with your current rear wheel. It's more trouble than it's worth.