So I upgraded to an iPhone 4 from my 1G. Lost my Shazam grandfathering and wrote them about it. They responded that if I send them my receipt and UDID they would grandfather me back in.
This is all fine and good, I was very excited. HOWEVER, I have two iphones, both of which I upgraded, that use the same iTunes account. Shazam refused to update both! They said I could only get one updated.
I find this as really poor customer service and will be looking for other options, including of course going back to version 1.7.