The BDP-83 can actually already be ordered on an invitation-only basis for people who expressed interest in the player and signed up several months ago at Oppo's web site. They are to be available for ordering by the public at large as of 5/18. I've already ordered mine.
I have had one for a couple of months and am totally happy with it. A friend of mine has also bought one and loves it. It has the best upscaling I have ever seen in a player and the ability to play all sorts of audio disks is a definite plus for me. Blu-Ray performance is as good as anything out there (but probably no better since any differences among Blu-Ray players are very minor). What few problems exist are being quickly address through firmware updates. Updating the firmware is easier than in any other firmware-updateable device I have owned.