vertical dropouts vs. horizontal dropouts
 

whats the difference. i know road bikes have vertical dropouts and fixed/track have horizontal but why?

Horizontal dropouts are used to adjust the chain tension on a single-speed bikes.

Track bikes do not have horizontal dropouts. They use trackends.

is there away to adjust chain tension with vertical dropouts? and wut are track ends?

Take a look here:
http://www.sheldonbrown.com/singlespeed.html

okie dokie thanx a bundle!

white industries now makes a fixed/free eccentric rear hub. this allows you to get proper chain tension even with vertical drops by adjusting where the center of the hub is around its axle. they're pretty nice looking. it's called 'eric's eccentric eno fixed gear hub'. it's at the very bottom of this page:
http://www.whiteind.com/eno.htm