[Haskell-cafe] Functional Reactive Programming

I was wondering, how much active development is done on FRP frameworks these days. What direction is it going in, and who are the users? I haven't seen much new on Yampa lately so I wondered how that was doing, or if it was thought largely finished and maybe something else was going on. For instance, maybe more of the activity is in developing wxFruit or suchlike? -- Mark