I visited Production Show in London last May. This is a show which shows you all the latest toys in boadcasting etc... I went to see Avid's new systems as I was planning to buy one. The guy was running the very software I have in Avid qualified Dell's 1.8Ghz laptop (It was M?? I think)... OK - just popped to mind yesterday to look can Powerbook do the same as one of my friends told me that Mac's are not that fast as I think they are (I have never claimed to him that my machine is faster than PC- but better to use) Anyway... last May the Avid Guy was able to play 4 streams of DV video. When he added the 5th one every second frame started to drop. No transitions nor color correction were involved. Yesterday I put 5 streams. 4 as a picture-in-picture as Avid guy did it in may. I put 4 simultaneous transitions in 4 pictures. Horns open, 3D rotation around Y-ax, dissolve & fade from color. PLUS I did color correct the clips. You guess what? YES, Powerbook still played everything on my sreen smoothly.