I honestly believe that if you feel it's not worth the money, then you're not using all of its features properly..I used to feel the same way until I had to do provide training on .Mac/MobileMe and it was only then that I realised its true value...
this is a post I wrote on MobileMe
{Hey,
I only got to use the PUSH for 3 days before my Phone got stolen. But while using it the system worked perfectly! PUSH email, contacts and calendars were all Pushed to my Pwned 1G iPhone instantly, and updates made on the phone all appeared on my Mac every 15mins when the mac synced with MobileMe. Apart from the push, MobileMe also gives you 20GB online storage to use as you please (i've set mine up as mobile FTP site) as well as 1-Click publishing when using web galleries and iWeb. MobileMe also stores all you're info online which saved my ass when my Powerbook, iMac and iPhone were all stolen last week, would have lost all my contacts otherwise!!! oh and there is also a type of VNC like client called back-to-my-Mac which allows you to see a home or work Mac remotely.
All in all i would be lost without my mobileme... its one of those products you don't need until you get it and then can't live without it afterwards...}