It looks like a new crowd funded project is going to fix this. The Jorno folds into three sections and looks like a coaster when folded. You can slip it into your back pocket, purse, or briefcase.
For me, the true test of a folding keyboard is the space bar. If it's split into two parts, they failed. Fortunately, the Jorno meets my test in this regard.
Keys are laid out where they should be, so there is little to no compromise. You can touch type as you would with a full size keyboard.
The Jorno includes a support for your iPhone or other device including Android. Since it's a Bluetooth device, it will indeed pair with Android devices, as well as iPad, iPhone or iPod touch.
This is a Kickstarter project, so your funding is needed. They have reintroduced their $79 early bird offer, so this is a good time to lock in the keyboard which will sell for $119 when it goes on sale next year.