Here's a link to a PDF with suggested 6th ed rules for the Eldar Online Codex: Harlequins.
An interesting unit now are the Death Jesters, since they are characters, their attacks can "snipe" models. This actually makes them quite playable. Other than this I don't really think the Codex needs any adjustments. 6th ed really hurt it though, small fragile elite close combat units are very tough to field, and that's basically all we have... But that's just a bigger challenge, and makes it more fun to play, if you ask me.
http://moerker.com/harlequins/EO-CH-refsheet_v1.0.pdfAny chance the forum can host the PDF? Knowing myself, I might delete it by accident ...