I’m extremely satisfied with Animoog on my iPad 2.
I tried it today my M-Audio KeyRig 49. Playing notes work perfectly, but the Modulation wheel doesn’t. Needless to say, to enjoy Animoog, one needs the modulation wheel to work 
The modulation does work in Garageband for iPad, so the iPad does support this modulation wheel.
Anyone has suggestions or workaround? Maybe it’s just a matter of updating Animoog to support the modulation wheel?
Thanks for any feedback! - Alex