Review my startup: In-App Chat for iOS
twothreeform.com
twothreeform.com
It smells like vaporware to me. The mock-up design looks pretty bad.
I would call it a weekend project idea, not a startup. If you want me to seriously take this into consideration, you should make a working prototype with SDK, tutorial and sample app available in the App Store.
If you want something more meaty I have a working SDK for in-app forms http://www.twothreeform.com and an app in the app store with a working in-app forum (search inspirational quotes, author matt sencenbaugh)