Hi Natalie and good questions!
We actually have already kicked off the beta testing for 4.0. You can, however, log into this site today and get an early test version of it the My Downloads section at the bottom of the screen. I will caution that this is a very early release and is not recommended for use on a production site since it has known issues.
Event Tickets is also in the works. We’re target to release it in the next couple of months, but will certainly announce it when it’s released. You can get notified right away by adding your vote in our feature request forum here.
Does this help answer your questions? Please let me know. 🙂
Cheers!
Geoff