No worries! One thing: if you use mysql, you'll need to edit your config after you run it the first time as they've changed the mysql...
The latest Dev build of mcMMO is working fine with the latest CB Dev - you can DL the mcMMO dev build here: http://play.mcmmo.org/
Most likely, Mojang gives money to this 'separate entity' for the work they do on Minecraft, seeing as that (and NOT bukkit) is Mojang's product....
To all the greedy impatient douchebags, try actually checking what bukkit are doing before you "WAAAAAAAAA!!!!!1111shiftone" all over the place....
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