as you know swype is a keyboard input method where you don't have to lift your finger to type. WM and Android users have been using it for a while, but now iPhone users can try it out as well.
Sorry, only jailbroken users can use it at the moment, and it is still in beta, so expect a couple bugs.
1) open cydia and add the repo:
http://wynd.x10.mx
2) search for swype and install