Two things that suck about JavaOne: it is nearly impossible to find power outlets for my PowerBook, and not all of the rooms have WiFi. OSCON puts JavaOne to shame -- nearly every room has a giant block of power strips, for the geeks to plug their laptops in. It is deplorable that JavaOne doesn't have this.
As for the lack of WiFi, I'm finding myself a bit surprised by this one. I'm finding that since I am blogging the conference this year, having the web available is necessary in order for me to sprinkle links into my posts.
-Andy.