Sometimes, all it takes is a simple and seemingly stupid idea. Any geek worth their salt knows this, because they've watched Office Space, and thus know the difference between the "Jump to Conclusions Mat" and the Pet Rock ("It made a million dollars!").
On FriendFeed today, I was alerted to Web 2.0's version of the Pet Rock by prolific purveyor of cool Mona, a site called "Umbrella Today?". The site takes the simplicity and utility of sites like "Is it down for everyone or just me?" and the question we all really want to know while we sit through the goofy antics of the local weather guy for seven minutes and combines the two into a quick answer so we can get on with our day.
For those for whom typing in a Web address and a zip code is too much work, they also have the weather report boiled down to a yes or no answer available for daily SMS receipt.