In fact, three years ago today you could only buy the Wi-Fi version, as the cellular version (Wi-Fi+3G) wouldn't debut until the end of the month. Still, my local Apple store had over 50 people waiting in line to buy one. Mine is still in great condition, aside from a few scratches on the screen -- I blame my cats.
These days the iPad 1 is a homebound device used when guests come over, or when Kid 1 is using the iPad 3 or as a supplemental entertainment device. My dock reflects this, with these apps in it: Music, Calcbot, Khan Academy, Safari, TangoRemote and a folder with more music apps and remotes (like Airfoil Speakers).