As we've seen, Sony sure doesn't hold back on its exclusive-to-China line of PMX PMPs, and it's just tossed yet another new model into the mix, with the PMX-U55 helping to fill out the low-end of the spectrum (and pick up where the PMX-U50 left off). This one apparently comes in only a 2GB version, and packs a decent enough 2.4-inch 320 x 240 display, a built-in FM tuner, and support for all the usual audio and video formats, not to mention a 7.5mm slim form factor. Of course, like seemingly every other entry in the line, there's no word of a release outside of China, but those there can apparently pick one up right now for 498 Chinese yuan, or just over $70.