Yongnuo‘s new YN-04 and YN-04 II flash triggers have been confirmed to be compatible with their popular CTR-301 and CTR-301P triggers. The YN-04 II has a hotshoe on the transmitter, allowing you to use an on-camera flash while triggering your off-camera flashes.
The YN-04 II can be found on eBay, Deal Extreme and elsewhere. A Flickr discussion on the YN-04 series can be found here.