$$ prints $, so $$a would print $a. What do you need this for anyway? If it's so you can generate thousands of binds with different key combinations, I really don't think that's necessary. If it's for recon, make use of loc files. If it's not, spamming binds is just going to be annoying to all the other players out there.
A couple more votes from me:
- Warmup time before round starts / while waiting for other players to join (instead of just being stuck looking at the message, actually let people run around and shoot)
- Don't count down the timer in DM mode when there are no players.