I bought the xoom in part to demo a webapp we are building. I found that one view consistently crashes the browser. it is a view with a lot of data being shoved down to the device. I tested across stock, dolphin, Opera, firefox and fennec daily build and some others. With the exception of FireFox i can get them all to crash, and i think FF survives because it down rez's images so much. My un-scientific conclusion is that there is a memory issue with Xoom / honeycomb. We don't see this on nook or other devices that we have put honeycomb on, which makes me think it is specific to Xoom.
Generically i see the browser just exit at times when i am using it, i think it is the same issue. Hoping this gets fixed soon!