I got one of the first Olimex lime boards (Allwinner A10 Cortex-A8 CPU, 1GHz with Mali 400 GPU, 512 MB RAM, SATA, HDMI, 2x USB host, 100 MBit Ethernet). It comes with a nice case. Don't forget to order a 40-pin 0.05" step cable to access the GPIO / LCD connector banks. Unfortunately, the UART / serial pins are not led out of the case. As always, a 5V DC power supply and FTDI TTL-232R3v3 cable come in handy.
/proc/cpuinfo is not that spectacular:
Processor : ARMv7 Processor rev 2 (v7l) BogoMIPS : 405.52 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x3 CPU part : 0xc08 CPU revision : 2 Hardware : sun4i Revision : 0000 Serial : 0000000000000000Some benchmark results are available here.