Attached Link: http://en.wikipedia.org/wiki/Slashdot

SlashDot.org, "news for nerds," is a high-traffic web site where computer types hang out. Typically, they post excerpts from news articles of interest to tech types, with a link to the source. They are so high-traffic that often, the sites they link to can't take the load.

So "slashdotted" means featured at SlashDot.org. It can also mean having your web site go down or become very slow because of being featured on SlashDot.org.