Yes. I'm just OCD, and would like to be able to remove "temp" and "test" and "" so I don't see them.

bitcoind listaccounts currently shows five accounts, only one of which is being used. What's the command to delete empty accounts, or at least remove them from my wallet?

I think you may be misreading your hash/sec number. If gethashespersec returns 640000, you aren't getting "640000 khash/s". You are getting 640000 hps = 640 khps (640000/1000).

In order to reach 95% probability, you'll need to run for 8483 days.  :/