I'm think I'm in the minority, but I really like .Mac. Truth is, I only use it for iSync-ing my Contacts and Calendars, but it's worth it for the convenience. Sure, there are other free options I gather to do the same, but none are as painless as just giong thru .Mac.
Occasionally, when I need to post a video for client review and a given server is full, I'll throw it up on .Mac. Handy.
Originally, the FreePlay music was only on .Mac, not it's provided with FCP. As it turns out, FreePlay is not and never was "free". Apple inaccurately presented it as license-free. Turns out they have a very ingenius licensing model as well as some built-in audio watermarking.
I never bothered with Virex, cuz really, what's the point? As soon as an OS X virus hits, it'll be all over these threads and I'll deal with it then. Until then, it's a waste of time and computer resources.
Other really cool things that I never use include being able to post an iPhoto gallery with one click. I mean, that is just plain cool, fun and butt-simple. I should make use of that some time.
The email is useless to me. The last thing I need is another email account. I have two accounts under my business domain and, frankly, that's one too many. I should never have set up the second. Pointless.
I'd say for a lot of people, .Mac is mostly fluff, but for some of us, it's really a nice value and very useful.
What's this? Huh, Skywalker Sounds. Free sounds? Cool! DL-ing now. Always nice to add to the library.