I just got a hit from "wizard.dataforce.net". User-agent string is "Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)" which looks a little too nice and neat (and outdated) to be anything but a bot. But what bot?
All it did was grab my most popular page (the one all the SE's are hitting this month, baby :) and left. It did not ask for robots.txt.
I couldn't find any info about it on Google, except that it appears in a lot of server logs.