http://hougen.u-biq.org/

Great page for learning Japanese dialects

Would love to hear from other people about
resources for learning Japanese dialects.

Thanks heaps, this is great. I love knowing dialect, if only so I can understand the people around me.

Just be aware that sites like these usually include everything without regard for who uses the expresssion and how common it is. I once read a site going into great detail on the Nagoya dialect. I mentioned some of them to friends and they said "Yeah, my grandmother says that sometimes". For the Nagoya dialect ones, most of them are only used by old people. The ones that aren't, are not necessarily used all the time either and some are now part of the standard dialect. EG.

sentence-final particle "wa" (feminine word) => "wa" (men and women)
owatta wa => owattawa

You can look up stuff you hear which is good, just be really careful of saying any of this stuff until you have heard it many times to get a feel for it (and people your age typically say it).