I've seen Muriel's Wedding, Alex - brilliant, with or without the soundtrack.

For some reason I associate it with Priscilla, Queen Of The Desert (more understandably) and Strictly Ballroom (less understandably). Also brilliant and entertaining films.

Mamma Mia!
Not seen yet, Cap. My problem is that Abba were about the first band I got into (ah, but I was so much older then...), but then I came out the other side well before their kitsch [sp?] resurrection. Not that I hate all their music now, but if I hear Dancing Queen I'm more likely to slit my wrists than go for a happy bouncy dance.