LetaBot

You can always watch the StarCraft AI stream: http://sscaitournament.com/

If the human player builds a wall, he/she will be ahead against a rushing bot.

Using that on Battle.net violates the TOS. So your account will get banned if you do that.

If you (or your bot) play on the private server ICCUP, you don't need the disks. Just download the ICCUP version from: http://iccup.com/en/starcraft/sc_start.html

My micro bot is basically generating heuristics in the form of if/then statements and testing them in against itself playing the other side. It already has found hit&run on 1 level on its own, but it still isn't good enough vs human players.

Contact me on TeamLiquid for the bot + code and for any future micro tournaments: http://www.teamliquid.net/forum/profile.php?user=LetaBot

You can find some of that information on Liquidpedia: http://wiki.teamliquid.net/starcraft/Category:Bots

The custom map is called MicroTournament10.6 . If you want to try to focus only on micromanagement, that map is perfect for it.

If you want I can give you my micro bot for that map as a benchmark to compete against.