Welcome! Mark good to have you aboard. Banana seeds some can be hard to germinate. as with any seed soil temps and moisture are the keys. we have some excellent resources for finding out for us newbies. Banana seeds have a vary hard outer shell I've heard that some of the Banana.org people file it down until they get to the lighter part inside being careful not to damage the Germ. that lets moisture get in at an exhilarated rate or you can just Waite and let them do it on there own. Gab for example stated in one thread that his Ensete ventricosum seed took 6 moths to germinate. Chong is the go to for really specific Temp guides shes a wiz. Medea hound knows tuns too. but really if you just do searches for topics there a bunch of threads that tell you what to do.
Ps i found this vid in a search its kinda fun!
http://www.youtube.com/v/8bU6wley2HM&rel=1
also heres a thread that will get you started.
Germination guide 