I don't know the correct answer to this but is your website relevent to it ? if not then its no point because you should be linking to relevent websites but by all means try it and let us know your results
Most discussion seems to be around edu and gov sites...but if a site is an authority site and you are getting a link, I wouldn't think twice because google likes authority sites.
There is a similar question about a .edu.au TLD link in this forum right now, but in case anyone missed that answer, I'll repeat it here: Foreign (maybe I should say non-U.S.) TLD's help you rank in google searches in the same TLD. For example, the .ac.uk link is probably a pretty good link, but it will help you far more in a google.co.uk search than a google.com search. Remember that people all over the world use google.com, but many will use their own country's TLD google to help return geographically relevant results. To answer your question specifically, illuminati, the link may or may not be valuable depending on the site, but it certainly can do no harm whatsoever.
I have had the good fortune of obtaining one-way inbound links from .ac.uk websites. It's difficult to say how much boost it gave me, but consider this: Google knows that .ac.uk is the British equivalent of .edu - if, on top of that, it's one-way, the editorial endorsement value of these links is huge. Well worth pursuing.