What is MonkeyCom on port 9898?
MonkeyCom is (or was - as far as I can determine it is now defunct) a videophone/file transfer program.
As far as I can determine nothing legitimate is currently using port 9898 - it's pretty much just Sasser and a few other bits of nasty.
Tripwire Enterprise uses 9898 as it's default port for communication between server and agent.
pgpool might be using that port.
You can do a "lsof | grep 9898" and check.