Welcome back! Good to have you. The RT hacking scene has gotten pretty sad lately.
The jailbreak does still work on 8.0 (although I got one instance where it slowed the tablet terribly for a couple minutes then bluescreened with a stop message about a critical process dying, but usually it works fine). The current primary focus is on getting it working with 8.1. Read the first few parts of the 8.1 jailbreak threads to see what the problems are (in short: CSRSS is now a protected process so we can't debug it, and PatchGuard now checks the signature enforcement flag so the tablet will bluescreen after a while if you modify it). If you want to help, get in touch with @Myriachan
(if you aren't already; I think there was somebody else working on it but I forget who) and see whether you can lend a hand.
If we can get past the first problem (protected process), I have some ideas how to handle the second one (PatchGuard). I can't guarantee it'll work, though; bypassing that stuff is hard and I've never tried before.
If you want to have a test install of 8.1 alongside your 8.0 install, that's possible. However, it takes a lot of storage space; I'm not sure if it can be done on the 32GB model.