Just a couple tidbits to add.
1. In iPhoto, I find that I can just drag each roll to the sidebar, and iPhoto will create an album for it. So I did this for all my "rolls," to duplicate the folder structure of Picasa.
2. When editting a photo in iPhoto, you can adjust the color semi-automatically. It's the same idea as finding a neutral color in Picasa, but manually. In Picasa, I can just click 1 button. In iPhoto, you press the Apple key, find a neutral gray color area, and click on the area while still pressing the Apple key. iPhoto will adjust the photo's color accordingly.
Now, in regards to Office 2004 test drive. I know I don't and won't use or need it, so might as well uninstall it. Sounds simple right? I went to the Office 2004 test drive folder, and there's an "Remove Office" icon. Double click that, and went through a couple of screens, but on the screen where the uninstaller ask for what program to uninstall, it listed nothing. WTF?
Searching google, there is not much info about this. I was thinking, maybe the program is not "installed" yet. It's in the hard-drive, but in a pre-installed state. This is very common place when you buy a PC which have tons of pre-installed trial/bloatwares, where the files are in the hard-drive, but final/finishing installation only happens when you start using the programs. So, I decided to run MS powerpoint, went through the license agreement, and quit. Then I re-ran the uninstaller, now it managed to find the office 2004 test drive program. Weird part is it also found Office X (an even older office version for the Mac). Finally, Office 2004 uninstalled, and trash is emptied.