I use about:blank because I do not always wish to go to the same page each time I launch my browser, and I don't want to experience a slow start-up as my browser loads a pre-defined home page.

Out of curiosity, if you find this data, what do you want to use it for?

I use MyYahoo, and have for what seems like forever. I have never understood the appeal of the blank Google page as I like to see the latest news feeds (NY Times, BBC, and such). I tried iGoogle, but still prefer the MyYahoo layout. I also have my normal daily sites (Techmeme, Hacker News, local news) setup in the Firefox bookmark toolbar.

On my work PC I've actually got Firefox setup with 4 tabs (work-related sites) that load when I start it, though MyYahoo is set as the homepage there as well.

I just use the front page, but using the new page probably makes more sense. I'll undoubtably end up at the front page anyway.

http://start.fedoraproject.org/ , though thats cause I just havn't changed it.

I have netvibes as my homepage