BusinessInsider pointed us to an interesting update to the Google Wallet website today: Google is now advertising “the next version” of its mobile wallet app and providing a link a to request an invite. The website has a link to “Request an invite” for when the new version is ready, but even more interesting is what happens after users do so. After clicking the link, Google asks users to select the type of mobile device they use. The three options include: Android, iOS, and Other.

There is no details regarding what might be included in the next generation of the Wallet service, but many are speculating Google might have plans to extend some portion of the Google Wallet app to iOS and possibly other devices. An iPhone version of Google Wallet would of course not include the NFC capabilities that have limited the service to select Android devices, but perhaps it could provide some type of integration with Apple’s Passbook feature on iOS? We have requested an invite to the new version of Wallet, and we will keep you updated when we learn more.

Google also announced today that Google Wallet is now available to Galaxy S III users on MetroPCS:

Today Google’s biggest wallet competitor is officially launching, with AT&T, T-Mobile, and Verizon teaming up to offer the ISIS mobile wallet solution in Austin, Texas and Salt Lake City.