PS - I've read great things about this one, but not sure if the angle is wide enough: Meade Instruments 07742 Series 5000 14mm Ultra Wide Angle
(Focal length is relatively small for most of the wide angle pieces I've seen)
http://www.amazon.com/gp/product/B005HSPUVO?colid=33MF9KDM3YTOL&coliid=I2FTMNY1E9V1AP&ref_=wl_it_dp_o_pC_nS_ttl