I have a set of keybinds that I rarely ever get to practice on this monk and I'd like to use the next several weeks to learn everything (bunch of arena123 macros). So, to answer your question, that's what I'm practicing mostly.
I believe 2v2 will be sufficient to practice with but 3v3 will work too if I have multiple people willing to roll (2 healers + me dps would give me the most bang for my buck in practice I think). Again, the intent isn't to win games but to practice spells, binds, new stuff when patch hits, macros, addons, ... yah know the whole arena setup really.
Please let me know if you're interested. I play in the afternoons normally and am a mellow headed guy.