FPGA world is interesting and if want to peak in – you need proper development board to start with. Saanlima Electronics designed pretty decent development that has lots of features so you won’t have to look for some time.
The heard of development board is FPGA Spartan-6 that comes in 324 BGA package. Among features on board there are 64MBytes of DRAM clocked at 200MHz, 2 channel USB through FTDI2232H, DBI/HDMI interface. Also there is a micro-SD socket, USB host interface, several LED indicators and 48 I/O pins broken out in Papilio style.