When I watch stuff from Blip it's usually something I want to watch on my Netbook while I'm cooking/doing dishes/kitchen stuff. Sadly Blip's flash player (and Hulu's for that matter) does not play nice with the underpowered little beastie, so I use the RSS feeds from Blip to download the episodes I want to watch.
Just use http:// blip.tv/<Show Name>/rss/
Example:
http://blip.tv/OLPresents/rss/
That said, I am a little puzzled as to why you think watching a short commercial is an unfair payment to watch an episode.