Guess these are their own subgenre now. Out Monday. Subscribe to the TouchArcade YouTube channel http://www.slidetoplay.com/story/watee-hands-on-preview
They've seem to have taken a time-tested core gameplay element and made it appealing to the mainstream audience out there. If competently done, I can see this becoming a good-sized hit on the app store.
Where's My Water's already stormed up the charts, but the Appstore had space for both Feed Me Oil and Sprinkle, maybe Watee can squeeze in as well. Still, they have to be a little pissed they didn't launch a week early.