Hi Keith,
The Selfloops device natively supports all existing ANT apps which use the ANT+ Alliance's API. All Android applications running ANT use an Android specific API which interfaces through the ANT Radio Service, and the ANT Radio Service decides how to handle those requests. There's an API which hasn't been released which acts as a "chip" interface to the ANT Radio Service, so that any device can report itself to the ANT Radio Service as an ANT device. This is what the "ANT USB Service" and what the "Selfloops ANT Service" do, so the apps don't have to worry about what the hardware underneath might be.
If you'd like I can look into at least sending you the interface if you'd like to get it up and running yourself.
Cheers