Ever go to the store with your list of things to buy, then realize you left it on the counter when you get there? ReQall to the rescue. But what’s even cooler for me, is that I can be driving by the pet store and will receive an IM that I need to pick up another 25 lb of bird seed (we’ve got a bunch of hungry twitterers, and I don’t mean the digital kind)!

Check out David Pogue’s “State of the Art” column for his full review.