As initially reported by ThinkSecret, it appears that WWDC will bring long awaited Display Updates.
It appears, however, that Appleinsider's pricing report is not accurate. Their report claimed a price drop for the new displays with prices ranging from $999 (20") to $2999 (30").
Instead, based on sources, it appears that the revised 20" and 23" displays will keep their current prices, and the 30" will be introduced at above $3000.
MacRumors should have coverage of the WWDC Keynote tomorrow which starts at 10AM Pacific.