A complete guide on how to jailbreak iOS 4.3.2 running on iPod Touch 3G and 4 has been released. Basically, you download redsnow jailbreak tool and follow the instructions on the screen. This new upgrade does not brings anything new to the tablet. Apple itself says all this 4.3.2 upgrade does is fixes several bug fixes and does not add any new feature.
And since Redsnow / redsn0w runs on both Windows and Mac you jailbreak it using any computer out there. Find the jailbreak instructions here.