I've made a solution for playing FLV files with
JW FLV Player - this needs to be installed on your server though (still it's nice to stay within AME rather than use more resources for another media playing solution to play FLV) - so download the player and put it in a folder called "jw_flv_player" in your forum root directory, then install the xml as normal it it should work fine
I've also updated the quicktime support so that it correctly scales the video to fit the player - this prevents the issue of higher res files pushing the controls off the bottom of the player.
Hope these are useful to someone. (any help with blip.tv support would be much appreciated)