Web based time sheet?

[Thomas Cameron]

Does anyone have any real experience with any F/OSS web based time 
sheet/time tracker software?

Basically I have a customer who runs a consulting-ish company.  He needs 
to be able to track employee hours per project.

I've Googled and I see several projects, so I have a bunch of leads.  I 
am looking for anyone who has real world experience with these things 
though, so if you've used any please let me know.

-- 
Thanks!
Thomas