Well, for now it doesn't seem like there is another option. But, the way things move around here, I'd expect there root to be available via another method at some point. However, I don't understand anything about how the devs do their magic (I just follow the instructions they provide) so unfortunately I can't speculate about how long it might be.
I have a locked bootloader so I don't know if I'll be able to use custom roms in the future (although I'm more than happy with root and 2.3.3). If you want to have a go at flashing the 2.3.2 firmware, rooting and then updating OTA to 2.3.3 then feel free to ask questions here and I or someone else will help you out (it isn't hard really).