Pinterest is probably my favorite web discovery for 2011. I can easily get lost in there for 15 minutes/day repining. I am sure some users spend one hour or more/day on the site.
Same here. I am planning my wedding, and Pinterest has been invaluable! Protip: If you can find the founders email (I can't remember of the top of my head), you can ask for an invite directly, instead of rotting away on the invite list.
That would have been super nice. I think I waited several weeks, but I got in :). Thanks.