Bavarian Star Trek:

Radio Dingolstadt
A web radio making comedy. There is a parody on Star Trek Voyager which is mostly spoken in Bavarian (and little bit Standard German).

Trek Dinner München
A bunch of Trekkies meet once a month in Munich to talk and have fun. For sure there'll also be bavarian speaking folk!

There is not much Bavarian Star Trek, but I'll keep looking and post what I find.

Other Bavarian stuff:

Books

Grammar book (in German!):
"Bairische Grammatik" by Ludwig Merkle, published by Allitera Verlag, ISBN 3-86520-078-8
A really good grammar book! Very accurate and professional. Children Stories:
"Woaßt du ibahapts, wia gern dass i di mog?" by Anita Jeram, Sam McBratney, und Ottfried Fischer
"Asterix Mundart Graffd wead!" by Rene Goscinny, Albert Uderzo, Carl-Ludwig Reichert, und Hans Well
"Asterix Mundart Da Subbnkessl" müncherische Ausgabe
"Asterix Mundart Auf geht's zu de Gotn!" bairische Ausgabe
"Da kloa Prinz Der kleine Prinz", bairische Ausgabe
Toni Lauerer Weihnachtsgeschichten - "Endlich wieder gschafft" by Tony Lauerer (comedical stories/dialogs)
"Baierische Weltgeschichte" by Michael Ehbauer (bavarian world history - funny rhymes, not seriously meant)

Music:

Haindling (musician with smart lyrics and all kind of weird instruments)
youtube: Bayern, des samma mia - Wie sich Fische unter Wasser küssen (with subtitles) - Rote Haar

Biermösl Blosn (3 brothers who sing humorous songs with bavarian music)
youtube: Welcome to Bavaria - Win 98 - Feuerwehr-Hymne

Spider Murphey Gang (band of the 80s)
youtube: Skandal im Sperrbezirk - Schickeria

other medias:

Learn Bavarian filmclips - but they are a comedy, no real learning videos!
"Die Komiker präsentieren: Altbayerisch für Einsteiger" DVD, produced by the BR (Bayrischer Rundfunk)
It's a comedy series (every episode is 2-5min), with typical every day life situations. The people talk with the deepest Bavarian accent, while a reporter is translating the phrases to Standard German in a not always accurate way, which is very funny. You won't be able to learn Bavarian with this films (no subtitles, no English), but if you just want to get the sound of it, or know some Bavarian already, then it might be fun.
On youtube.com: Sauberkeit und Hygiene - Der Single

"Wer früher stirbt ist länger tot" movie about a boy who has lost his mother; sad and funny. All actors speak Bavarian