Is coming very very soon. You need to make sure Ghostscript is setup on the server correctly. You need to make sure Ghostscript, GSPrint, and GSView are setup on each client correctly. See http://compkarori.no-ip.biz:8090/index.php?title=Documentation_Index/Printing/Ghostscript%2C_GSPrint_and_GSView on how to configure these.
For anyone demoing synapse and doesn't have a GSview copy I have a couple of spare synapse user copies. Email me.