There is the possibility we could see a PowerBook G5 at WWDC. The only scenario for this I see happening is that it will be a 17-inch model only, running a G5 processor at either 1.6GHz or 1.8 GHz, for $3,299. Available in August. Meanwhile, Apple would continue to sell the current G4 PB's. _
Think about this, when the 17 was first released it was $3,299. It is now $2,799. We saw a similar price drop like this when the last of the G4 towers were released (the last rev before the G5s), and this scenario fits nicely with previous modus operandi from Apple.
Given what we know about the newer G5 chip and it's strained availability at its new process, in addition to the fact that the 17-inch form factor would be the most accommodating and forgiving relative to the G5's heat, I think my scenario is the closest to reality there is relative to any speculation about G5 PowerBooks at WWDC.
Now I don't know what the likelihood of anything like this coming from Apple at WWDC or this summer is. But I will tell you one thing, ask anyone who bought the first PowerBook with a SuperDrive from Apple in November who thought there would be 12- and 17-inch PowerBooks a few months later in January? And you would have a resounding, "No way in hell."
I'm sure Apple is not going to spend the entire WWDC demoing Tiger and Tiger's coding tools. While not much has been discussed about revolutionary new features in Tiger, it sounds to me like it's going to be a bland update. Much more so than 10.2 to 10.3 was. I also don't believe they are going to spend much time demoing towers that cannot reach 3.0GHz as was promised to members the year previously. I think that the PowerBook 17-inch at G5 is something that is feasible now, and if Apple chooses to woo developers, they just may put this thing out there. They will want momentum after this show, and this could provide the forward momentum they are looking for.
Then again, I could be off in left field again