Video!

Video is available for the bring in an animated mesh from Maya to UDK; take a gander and don't forget there is a pdf on the previous entry!

http://youtu.be/rm0YIrygiY0

bringing animation from Maya into UDK / Unreal

I can't seem to find the part with the exporter; but this part is once you have exported the .psk and .psa files from Maya

http://www.jaynatopia.com/tutorials/UNREAL_MAYA_ANIMATION_TUTORIAL2.pdf

just an additional fyi, the max number of mesh influencing bones in a skeleton is 75, the max number of total bones in a skeleton is 256 and you can set an influence limit of 4 joints per vertex.