Looking for some video to fill that Ipod of yours? Seattle based Searchformedia just might have what you need. With over half a million videos indexed on their network of 
search portals per quarter, you will be able to fill your day with media if you so choose. There are two sites of interest; searchforvideo.com and searchforipod.com. Both sites do a good job of finding media content. Searchforvideo has recently added RSS capability (allowing subscriptions to topic areas and keywords), however, it does not support enclosures, so don’t expect to be able to download content automatically. 
SearchforIpod supports downloads (and interoperates with iTunes), but does not seem to have any RSS capability. So it looks like the most usable site would be a combination of the two (SearchforIpideo or SearchforVipod perhaps?). That said, both sites are pretty cool and provide access to countless pieces of multi-media content, so definitely take some time to check them out.