i am building a ladies fixed gear for my girlfriend. It is so far going well and very cheap. I bought a old schwinn frame, spray painted it pink (yes I know..), bought the bottom bracket adaptor, bb, crank, chain, cog/lock ring, and saddle for about $125. Have all the other parts already.

Only catch is she REALLLLYYY wants pink Deep V's.. Those are a lot of money. BUT for the record, it is going to be a pretty sweet bike once I get the $235 for those "way to hip expensive" rims.