I use myHours and love it. I have some people I subcontract for and they can view my time through the company tools and I have people who subcontract for me that I can view their time through my company tools. I love that I can go in and see what my subs are doing timewise at any time in the month.
FYI...I wrote a blog post on my very underutilized blog on myHours and setting it up. I've had some people find it useful.
http://www.tayloredofficesolutions.com/blog/2006/11/
Lanel Taylor
Taylored Office Solutions