I take it you don't need high speed sync/ttl?(that trigger doesn't have it). yongnuo rf-603's are basically identical(unless I'm missing something) and they're only $30 or so, and since the triggers and receivers are identical they can easily be used as triggers for the camera, and flash triggers, lots you can do with them.
If your 430ex already does high speed sync and has ttl why would you want the yn568 over the 560(also if you get the 560iii it has a built in receiver that works with the rf-603's, so you wouldn't need to buy an extra rf-603)