inetd or xinetd. It may listen, but won't respond.
Oh, someone or something was looking for the "t0rn rootkit" which happens to listen on 33051 if available or 2222 if not.
Also:
host -t ptr 66.35.250.210\n210.250.35.66.in-addr.arpa is an alias for 210.0/24.250.35.66.in-addr.arpa.\n210.0/24.250.35.66.in-addr.arpa domain name pointer vhost.sourceforge.net.
Kinda explains it, might be a service that is checking for the rootkits.