[djsumdog]

You might want to check out the Fish shell. I've been using it for about a year and it supports completion for most commands by parsing their man pages. It's pretty nice.

[mwagstaff]

I tried Fish a while back, and liked it very much. Trouble is, I can't roll Fish out across a work server estate.

Well, I could. But then I probably wouldn't be at work much longer. ;-)