Thanks for the tip. Hopefully I won't need much current at 3.3v; all the I/O are 5v - only the m32c, sram, and ethernet would run on the 3.3v side.
OTOH, I should be able to upgrade the 5v switcher to a dual 3.3/5v switcher for a little more than that ($10 vs $3.50), but saving space and efficiency, and maybe coordinating power-on better. I'll have to do a new current budget and see. Of course, now the power/ground plane stuff got more confusing ;-)
