I've been led to believe that, hands-down, recording the audio separately on a device made to, er, record audio, and then syncing it all up in post is better.Zacuto USA on Vimeo
Zacuto USA's web site. Has some great products for converting Canon and other d-slr cameras into capable video outfits. Lots of neat videos.
They also shot the Bladdivan commercial parody on Canon d-slr gear.
New SNL title sequence and segments shot using Canon EOS 7D, 5D Mark II