GPS Track and Share App?

I am looking for a good free or cheap application that tracks where I am, shows some history and is available via the web for friends and family to follow me.

So far, MoosTrax seems to work the best, but only save the last 500 points and the publicly available map shows no history.

I recently tried Instamapper and for some reason it doesn't update as well as MoosTrax (and yes the frequency is set to the same number of seconds). Maybe this is why they can store 100,000 points...

Anyway, is there a better app out there?

Many thanks.