My morning's paper says Nautral Wonders stores have signed up with Momentum to offer FF miles for purchases at their stores and online as of Monday. Says any charge made with a credit card registered with Momentum qualifies. I know you can sign up on UAL's website and I think also on Delta's. Didn't say how many miles you earn per $1. Keep your receipts though as Momentum doesn't seem to be on top of things when it comes to posting miles.