Since the old thread got lost in the server crash, here is a new one.
Discuss online translation software, preferably English <--> Japanese!

Excite
http://excite.co.jp/world/english/
http://excite.co.jp/world/english/web/
My site of choice, pretty good!
Uses BizLingo

@nifty
http://www.nifty.com/globalgate/
Fairly accurate, works with popups
Uses AMIKAI

AltaVista
http://world.altavista.com/
Babel Fish is DQN
Uses SYSTRAN

Jeffrey's Japanese<->English Dictionary Server
http://www.solon.org/cgi-bin/j-e/jis/dict
Excellent dictionary, kanji-lookup pages and many more things! A+!
Currently down, but there are mirrors linked.