It’s been ages since I visited the R website, so I don’t know how long they’ve had a wiki. It’s built using DokuWiki, one of my personal favourites.
This is a great leap forward for R documentation, which is somewhat notorious for being (a) difficult to find and (b) difficult to understand when you find it. If you’re a power R user and have a spare moment, please contribute.
What You're Doing Is Rather Desperate 
I encourage you to check out the Sage project (http://sage.math.washington.edu/sage/) which has created a nice web-browser interface to R (and many other things).
-M. Hampton