I got some GT bmx pedals for about $12 for my commuter and they are great:

http://www.gtbicycles.com/2013/goods...on-pedals-9-16

Or if you want foot retention there are "normal" shoes that are spd compatible

http://www.chromeindustries.com/us/en/footwear/city-spd

http://www.dzrshoes.com/