Google wallet currently uses an embedded secure element on PN65N nfc chips right? The Amaze has PN544 chip which does not include an embedded secure element, but the chip does support SWP (single wire protocol). It seems that the ISIS app will probably be using SWP technology and should work on the Amaze whenever it gets rolled out (soon.....)? ISIS should be as good or better then google wallet so that would serve the purpose. Then I guess folks should make sure to purchase a phone with an nfc chip that includes all the options for secure element (swp, embedded, and micro-sd) so then one would be able to use whatever app they like best.
Phone: HTC Amaze - T-Mobile
ROM: CM 10.1-20130404-UNOFFICIAL-ruby