For homepage stuff I have 9 options for iMovies on the homepage, and for photo albums I have 17 themes to choose from. Overall there are like 68 formats for different things such as your public iDisk, site menu, iMovies, iPhoto slide shows, writing pages, resume pages, baby announcement pages and education pages. They keep adding to these as well as other .Mac benefits every so often so I expect these to expand in the future.
Some other key benefits are:
You can get referrals for others to join and get 20% off your own subscription renewal (they say you can even get five people to do it and therefore get your year for free).
the email account is very reliable- they had some early problems(12 months ago) with reliabilty, but I have had no issues with system being down in the last 8 months- and I use it for my primary account and access it dozens of times a day. The backup and homepages are great and reliable as well. They had issues right when I signed up with homepage, but since then these problems have been solved. They also provide many free software programs like PhotoStudio (which is like PhotoElements) among other offers. Really, the back up space they give you and the ability to back up your important files without even thinking about it is terrific.
Being able to sync your book marks and addresses is very handy if you ever access the net from another PC or mac. With the bookmarks, you simply sync with.Mac and then wherever you are you can go to .Mac, open a small window that has all your bookmarks from your browser at home in hypertext form...very easy and handy for when you are not at home. You don't need a mac to access the bookmarks or address book online and you can send mail though the .mac web page too.
There are lots of free music for use in iMovie and iPhot slide shows, sound effects from Skywalker sounds, Keynote themes if you use Keynote (which I don't) and lots of training series videos to help you get the most out of your software from Apple. The file sharing with iDisk has made it easy for me to share pics with my inlaws as they just go to my idisk page and download what pics they want to print.
Good luck!