A friend of mine has a website and whenever some yahoo in his feed aggregator posts long words, or long links in the first paragraph of their post it funks up his CSS outline.

Is there a script he can put on his page to limit the maximum word length to something like 25-30 characters (either cutting the word off or inserting an arbitrary ?).

Probably, but what does that have to do with greasemonkey?

well, nothing I suppose, but I've gotten better javascript help here than anywhere else.

http://www.w3schools.com/css/pr_pos_overflow.asp