That's the bit that surprised me most about this article. Controllers for phones are NOT new.

iCade Mobile, iControlPad, and the umpteen bluetooth ones that don't clip on, but connect wirelessly and give you a PROPER gamepad for your iPhone/iPad.

As for Android, you can connect PS3 controllers and any number of aftermarket ones like above.

I get that the above linked one works for both iOS and Android, but very few people own (and regularly game on) both types of phone at once, so needing a multi-platform controller seems like a pretty niche market.

Not to mention the new version of Blutrol (jailbreak tweak, see http://www.ringwald.ch/cydia/blutrol/) which lets you connect up and use with any game (not just dev-supported) an iCade, iControlPad, standard bluetooth keyboard, PhoneJoy, Wiimote, or Zeemote JS1.

Here's one more for your list:

http://tenonedesign.com/flingmini.php

Agreed, in fact I have never seen anyone using one of these smartphone gamepads and quite frankly I can see why: it's another thing you have to carry with you and besides not all games are/will be compatible.