Seems the thread sort of got sidetracked. I'll put in my two cents anyway...
I feel that .Mac is BARELY worth my money and BARELY not worth my money, at the same time. In face value, $100 is a bit much, I agree. But in the big picture, it's only $100 a year. You pay $100, then forget it for another year. In that standpoint, the money isn't really a big deal. The convenience of the integration with OS X, iDisk, and the ease of use of it all is a relief from the cheaper way of doing all those things. I rent a "real" web server for my websites, but it's such a pain, having to FTP to it to upload stuff and all that. iDisk is so simple. I use it to share - post pictures on message boards, show friends pictures or my iPhoto library or some movies I made, etc. It's mainly a sharing medium for me. Also, I use it to store stuff I don't want to lose. This way, when I decide I want to reformat and reinstall, it'll only be a 30 minute affair, and I'm back up and running with no hassles.
So it's really up to the user and how he/she wants to do things. For some, like those who just want a @mac.com address, .Mac is retardedly overpriced. But for those who use many of .Mac's features, the price actually isn't that bad at all.
Of course... APPLE, UP THE STORAGE!!! WE, THE CUSTOMERS DEMAND IT!!!
