It looks like the Jenkins guys are really doing what they can to make the best out of the namechange/backstory, and I'd say it's working. I'm a Perl 5 developer and haven't had anything to do with Java at all for a long, long time, and never had heard of Hudson. But now I know what they provide, and since I see Jenkins' name mentioned regularly in non-Java projects these days, I seem not to be the only one.
So, more power to them. I always like it when open source communities can show their strengths and have it noticed.