Some of you may have run across this on Twitter, either via the @adCenter or @MSAdvertising feeds, but I wanted to take a minute to mention it here on the blog as well. Bing is celebrating its 1st birthday by giving away some cool prize packages with mouse pads, computer skins, pens, stickers, cups and more. Winners will be chosen at random on July 19th, so if you're interested, head on over to the Bing Sweepstakes site and enter to win today!