According to my husband, who has watched the “webisodes”, there is important information there for a fan. Things like what is was that Baltar whispered to Gaeta that made him flip out are revealed. Probably not vital viewing, but not entirely filler fluff, either.
I second the suggestion of watching the webisodes. They are, or at least were recently, hosted on Scifi.com. Probably still there. You can watch the regular webisodes, or an enhanced version with comments from the writer.