It would be nice. An [Outdated] tag helps, but I run across a lot of guides that are out of date, but not tagged as such. Probably because the update doesn't completely negate the value of the guide. Still, knowing how recent a guide is would be very beneficial.
Like my Mundo Guide, which is only a week old. It can be found here.
It's called 'Dr. Mundo - A Comprehensive Guide to Going Where You Please and Applying Cleaver-Flavored Head Medicine'
Unfortunately, that didn't fit in the title, so it's titled 'Dr. Mundo - Getting to Know Your Local Physician'. I know, not quite as cool, but we gotta work with what we got . It focuses on a DPS build for Mundo, and using him as an Anti-Carry. There are gameplay tips/explanations for both Summoner's Rift and Twisted Treeline. It also has a flexible build/skills explanation, and is pretty in-depth. I hope y'all like it, and please feel free to leave feedback/up-vote (or down-vote... I guess...), I'd love to see what people think of it. I plan on updating it as needed, and adding content.