Stella is a free and paid service that can help you see how fast your site is as well as track uptime/response time, and more. Paid plans give you updates via SMS as well.
Besides being a brilliantly-functional service, the site design and copy is sweet too!
So how does your sites perform?
Joe Chavez says
Ugh! Mine was “The Slowest.”
All this time I was thinking it was just my PowerBook or my browser.
I have to get this figured out.
Terrible.