The 20" and 23" should show up sometime in July, while the 30" won't be until August. I'm sure Apple Stores will be the first to get them though and since the 30" requires a G5 with the 6800 card, they may be the only ones with a working 30" demo for a while since the 6800 is a BTO option. I doubt many retailers will upgrade their G5 demo models with the $599 card.