Getting a new powerbook, but not sure what one.

Bam! That's your answer. No other laptop will feel as compact and tiny as the 12" PB... I would know; I had a 12" 1.33GHz PB and now I have a 12" 1.33GHz iBook. I still wouldn't trade my iB for a PB-- but I do miss the tiny form factor of the PB.

 

This gives a comparison:
http://store.apple.com/Catalog/US/images/portables_comparison_chart_np.html
I don't think there's much difference in the video cards.
Since you mention 1.33 GHz you must be talking secondhand. Lots of people think that prices will drop in January when Apple are thought to be releasing the first Intel based machines (possibly iBooks but who the hell really knows????). Might be worth waiting.....

 

I just REALLY wish that the 12" had a widescreen aspect ratio! That day that comes, I'll replace my trusty 500Mhz TiBook.

 

Between the two systems, I would go for the 15" PowerBook G4 (for the nice big LCD & better GPU).

 

Well there's a lot of talk about a 13" iBook, possibly widescreen, so maybe that's the way the little PB will go as well.

 

I have a 12" PowerBook and I love it. So small, easy to take to class. If you like the look of the 12", I say go for it. You don't want to get a bigger computer and then regret it.

 

I would get the 15" one. I travel with it and I do not feel like it is a big burden. I think the 12" was too small for my taste, but I did like the lightweight and compactability. If I did minimal traveling I would have got the 17". That this is amazing.

 

I would go with the 15" one too. I have worked with a 17" one and im not a very big fan of it. The 15" is just right!!

 

I like my 15" Tibook. I was afraid that going up a size would affect portability, but it doesn't one bit. The 15" is thin as a quarter (standing up of course!) and it's only 1 lb heavier than the 12".

I could never go back, imho.