+1 for this request
I currently use VideoGameGeek.com to do all of this, but that site doesn't do the greatest job with tagging where I own the game and requires manually marking each game as owned. I'd love to have all the functionality in one place and VGG has already said they likely won't incorporate account importing, so hopefully GG.Deals will incorporate tagging for "Beaten," "Abandoned," "Played," etc.