Hi bemmu, Thanks for the feedback!

1. We plan on offering Sponty in many different languages. 2. It also works great on the iPhone (and similar phones) and it doesn't require a time commitment like social networks do. We really want you to be in and out in three seconds. 3. Soon we'll add more authentication options. 4. Sure, SMS works great for one-to-one. However, it really does'nt scale if you'd SMS all your friends to see if any of them are up for grabbing a bite.