2.4GHz Rechargeable Handheld Bluetooth Wireless Keyboard for PC/PDA/Cell Phones

Pros: - Great little keyboard to carry around with your smartphone (Or in my case my jailbroken iPod Touch)
- Also works with any computer with bluetooth
- Charges via USB

Cons: - Maybe it could be a little big bigger, but then you can't carry it around so easy.
- Takes a some time to learn to type on it, but after that you can type faster on it than on your onscreen keyboard. Well, in most cases.

Other: Works great on my iPod touch 3rd gen, I use "BTStack Keyboard" from the Cydia App store (Requires a jailbroken iPhone or iPod Touch... Unless you wait until iOS 4, because it will bring bluetooth keyboard support.

Pros: It is light, small, and lasts a long time on a charge. There's not much else you need in a bluetooth keyboard.

Cons: The key placement is a little odd, but you get used to it. Also the rubber keys take some getting used too.

Other: A good choice if you need a bluetooth keyboard. Now I hope you don't mind that I'm filling in the rest of my review with nothing but this severely long sentence that has nothing to do with the quality or usefulness of the keyboard that I have just finished reviewing here for you.

Pros: Small,
Easy to take with you,
Low in energy consumption, i didn't charge it from beginning.
Lightweight.
One of the least devices with the backspace on the upper-right!
The small manual at the back of the box is quite funny.
Not really a pro, but I had to tell

Cons: Not easy to connect, there is a very, very small "hidden" button above the "0" button, not easy to press with your fingers. The device "forgets" the connection if you use the on/off button. Than you have to reconnect with your phone.
Some buttons have a strange place.

Other: If you need a small KB four your mobile device, this one of the best.
Especially with the backspace at the right place!