Overkill, and possibly not supported for your exact board:
http://www.denx.de/wiki/view/U-Bootdoc/SupportedHardware
It does list support for 2 ColdFire boards.
You could try porting it to your board. it would be very educational. It might be less work to write a complete loader from scratch (I'm currently fighting an already-ported version of U-Boot that won't compile cleanly :smileyhappy:.
If you don't want to run the whole thing, you might find sections that do what you want (S Record, serial comms, flash burning).
You'll have to use the BDM once on each board to load this in though.