There is now an option next to the Raspberry Pi
The Gooseberry Board was announced in a limited production run of 500 units and comes with a 1 GHz overclockable A10 processor, a 400 MHz Mali processor, 4 GB of on-board storage as well as Android 4.03 ICS.
The manufacturer claims that the Gooseberry is "roughly 3 x more powerful in processing power", and twice the RAM (512 MB) than the Raspberry Pi. The Gooseberry does not come with analog video and lacks a LAN port, but supports Wi-Fi. At this time, the board only supports Android 4 ICS and Ubuntu without graphics acceleration. However, Gooseberry is offering premade images for Ubuntu. Support for Arch Linux ARM is "expected in the future".
The Gooseberry Board is offered for 40 British pounds, which translates to about $62. However, the board was sold out within a few hours after launch and there was no information if and when more supply will come online.