[Pharo-users] Pharo 4 - current state?

Hey, all. I had an hour last night to start playing with pharo 4. in the hour that played with it, there are already features i miss when going back to pharo 3 for getting work done. my questions is, how close is pharo 4 to be useable in a day to day environment? can i use it as a part of my regular development? what can i do to help move everything along? thanks!