I originally found out about Spire bags here at Go2Mac.com and I’m totally sold on their products.
I use my Zoom hard with my PowerBook G3 on a daily basis, and it has held up excellently for the past several years without even a tear. I’ve also tried a PowerBook G4 in it – it’s a bit snug, but it certainly fits. Spire has great quality, & great products.
Now I see they have the new “Icon” for the PowerBook G4. I’m interested to hear others’ experience with this bag.