Adobe to send out Flash Player 10.2 to Motorola XOOM owners within weeks of launch
The good news is that apparently, Motrorola XOOM owners won't have to wait terribly long for their upgrade. On the Adobe Flash blog it says, "Adobe will offer Flash Player 10.2 preinstalled on some tablets and as an OTA download on others within a few weeks of Android 3 (Honeycomb) devices becoming available, the first of which is expected to be the Motorola Xoom." So the players involved are all working on it and while it might feel naked to be walking around with a tablet like the XOOM without having Flash, it is looking more and more like a very temporary situation that will be resolved quickly.
source: Adobe via AndroidandMe