Sure enough, I punched in my character from the US realms, and I got the nice readout of where I'm at for all my reputations, and one click access to what exactly I need to do to move up a level (apparently I need to keep running Shadow Labs, grrr). Seems like it pulls everything directly from the Armory (where else would he get it from?), so all the info is as up to date as it is on Blizzard's official site.
There's also a checkbox now for "TBC Reputation only" that when unclicked gives a warning that says "Soon!," so apparently Liquidor is working on including Old World Azeroth rep as well. Just like we said the other day, this is a terrific tool for working on those all important rep grinds. Now, if you'll excuse me, I'm LFG Shadow Labs. Anyone? Please?