Whois/RWhois Server - what is everyone running..?

We are looking into the possibility of implementing our own RWhois server as opposed to continuing to provide information via SWIP. I am looking for any advice as to what people are currently running for their whois/rwhois server. I have seen http://www.rwhois.net and actually have it installed and running, but it utilized flat files instead of a backend database, and we have looked at the RIPE whois server as well. Searching Google does not seem to produce a variety of whois/rwhois server software. TIA ! ****************************************** Richard J. Sears