The 45nm Geneva processor will sit next to an M880G chipset, which will include Mobility Radeon HD 4225 graphics with 384MB of dedicated video memory. AMD hasn't released this particular component either, but it is probably a slightly improved version of the 4200 and should be capable of HD video playback. According to Macles, the netbook will have an HDMI output, optional Bluetooth 3 support, a compact charger and a battery good for 7 hours of use.
This wouldn't be Acer's first ultraportable laptop with an AMD processor. The company has been offering the Acer Ferrari One with an 11.6-inch display and an AMD Athlon 64 X2 processor since December. Pricing and availability for the Aspire One 521 remain unknown for now, but an announcement might come in early June during Computex.