The only new thing to appear is TTS (text-to-speech) - you can now have your messages read aloud to you thanks to the amazing eyes-free TTS library. Keep in mind I threw this in at the last minute so it's likely to be buggy - to use it, simply long-press anywhere on the message popup. If you don't have the TTS app installed it will take you through setting things up.
SMS Popup v0.9.92
- Improvements for status bar notifications (removed correctly now in certain circumstances)
- Threads marked read correctly now when a message is deleted via the popup
- Cupcake compatibility
- Beta feature: Text-to-speech, hear your messages! (long-press on the popup to try this out)