IMO, if you don't plan on overclocking, then get what ever board is a good name in your budget. I still like MSI, but they aren't great for holding out with a heavy OC for long. ASUS/Biostar are very good boards I think, though I recently had an AM2+ board from biostar fail and take out my old processor.
When looking at a board, look for a heatsink over the mosfets, (the little black parts near the CPU in large groups). Just try to stay away from MSI, or 3+1, or 4+1 phases on the motherboard if you plan to overclock some day with a 100w+ CPU.
I noticed a lot of MSI's support lists say just the Phenom x# ####, but doesn't give exact models of processors. My board is an AM3 and doesn't list that CPU as supported.
The move to a new memory type requires a new pinout configuration, though, and that's where Socket AM3 comes into the picture. You'll need a Socket AM3 motherboard in order to use these Phenom II processors with DDR3 memory. This new socket type looks an awful lot like the prior Socket AM2+, but it has two fewer pins, for a total of 938. As a result, Socket AM2+ processors can't fit into Socket AM3 motherboards. But in a clever muggle trick, Socket AM3 processors will happily drop into Socket AM2+ motherboards and work with DDR2 memory.
Also, please use edit next time, and if you wan't, give us your budget for your board, or post up links of the boards your looking at, and someone around here can surely help you shop around.