iOS client by Matthias Ringwald: Synergy client for iPhone and iPad. It's considered beta quality and not released yet. For those who want to try the beta: please install MouseSupport package using Cydia. Then, download ch.ringwald.synergyclient_0.8-9_iphoneos-arm.deb to your device and install using
dpkg -i /ch.ringwald.synergyclient_0.8-9_iphoneos-arm.deb and reboot to get the application on the SpringBoard.
Bugs: Please raise bugs on this site: http://code.google.com/p/isynergyclient/