My application doesn't show up in Market on a Honey Nook (and I presume Xoom)

Question

I've got a HoneyComb running nook. But I can't find my application (Car Cast) in the market... and I don't know why.

I've tried messing with the AndroidManifest's targetSdkVersion="3" android:maxSdkVersion="4" (and I've tried using 11)

I've also diddled (added/removed) the elements "supports-screens" although it seemed to me just using

  targetSdkVersion="3" android:maxSdkVersion="4"

Should be all I need to do... my app should just be there... Why isnt it in the market? Thanks!