Just upgraded my 1Ghz Powerbook last night from 10.2 to 10.4...took 1/2 hour to do the wipe/install from scratch (I don't like doing upgrades...rather do a full install).
Since I am on a older mac, i noticed the speed difference right away. The widgets are interesting, but I would like for them to show up on the desktop...not hide away. I am curiously playing with the iTunes one since it would be a learning start on how to control other apps.
I also was finally able to use my PC 5220 Verizon wireless broadband card...did the drivers from apple, and inserted the card with no problems.
I'm pretty pleased so far. I'm curious how the front ends will be hitting our forums now : dashboard and automator hacking anyone?