Following the yesterday AMD announcement, Acer has officially announced three new notebooks based on AMD's 2010 ultrathin platform, the Aspire One 521, Aspire One 721 and Aspire 1551.

The Aspire One 521 features AMD's single-core AMD V-series V105 processor clocked at 1.2GHz paired up with ATI Radeon HD 4225 GPU, and this 10-incher looks quite good according to the few videos posted over at Netbooknews.de. The rest of the features include 1GB of memory, a 160GB HDD, three USB 2.0 ports, HDMI and D-Sub outputs, and an ability to easily cope with 1080p HD video.

The bigger 11.6-inch Aspire One 721 features AMD's Athlon II Neo K325 paired up with the same Radeon HD 4225 GPU. As far as the ports and specs are concerned, this one is pretty much the same as the Aspire One 521 except for the obvious change in screen size and CPU.

The last but not least is the Aspire 1551 featuring the same 11.6-inch 1366x768 display but will be available with either AMD Turion II Neo K625 dual core processor, up to 4GB of memory, 640GB of HDD space, and the same Radeon HD 4225 integrated graphics. It also comes with HDMI output and is capable of playing 1080p content.

Hopefully more information will be available pretty soon as we guess that we'll see a lot more similar notebooks sooner or later. You can check out the Aspire One 521 hands on video here.