Hey guys - thanks for the comments!
I'm one of the developers for Pod2Mob, so if you guys have any comments or suggestions, fell free to PM or email me.
As far as downloading the podcasts to our server, we do! Our main site just provides streaming links to the original content, but our mobile site:
http://www.pod2mob.com/mobile
actually has several different formats. We download the podcasts regularly and encode them automatically. We support all 3GPP phones, Windows Mobile and Treos. (Although for the treos, we DO stream from the original Mp3 source).
Check it out and let us know anything we should change or add.
Thanks guys!
-Chris Lang
pod2mob.com