Yep, until I get my hands on the actual device, assume the current releases aren't supported on the PW2.
USBNet, KUAL & the SCreenSavers hack should work, and for those the
snapshots should be safe enough.
For the Fonts hack, on the other hand, here be dragons! I wouldn't recommend anyone checking the snapshot out unless you know what you're doing, and have a SSH/serial shell available.