Ideal bash environment

Custom Commands

pitch tent: expand on rndmcnlly's original idea to setup a temporary http server at '.'
- In bash? http://paulbuchheit.blogspot.com/2007/04/webserver-in-bash.html
- alias webshare='python -c "import SimpleHTTPServer;SimpleHTTPServer.test()"' (#54)
infect: given a remote ssh host, username and password, set up keys on that host as well as my custom bash environment
calc: a calculator (bc wrapper?)
portscan: #295
http://www.commandlinefu.com/commands/browse
A twitter command line client might be pretty spiffy, especially if I could pipe to it.

Put the time in the prompt (last 4 digits of unixtime? gmt hr/min? ?)
Put the return value of the last command in prompt (only if non-zero?)
Show how long it took to run the last command (and perhaps what the last command was?)