Are there other digital magazines out there?

I'm referring to "Portal 2 : the final hours" found on steam, for those who don't know it, it's constructed and reads just like a magazine but it adds videos, polls, photos in which you can move around in etc.  Anyway I think this is great I enjoyed it alot, probably because portal is in itself very interesting but I gotta say I think this digital magazine stuff is very neat, and its very well written. Are there any other types of digital magazines on the net? not just games, anything? 

Not sure if this is exactly what you mean, but you should check out http://www.gamerzines.com/.