I do not have iOS4 yet, however I'm curious to hear your thoughts on the two folder options. Stabbility? Speed? Appearance? Personally, I love CategoriesSB when its configured to show no images or titlebars. Can you configure the built-in folders to not show a title/etc? Also, w/ CategoriesSB, when using Iconoclasm, you can have CategoriesSB folders align in the same placement as your normal Springboard. By the looks of some screenshots I've looked at, it seems like the built-in folders load in seperate places not neccesarily aligned with the SpringBoard. Meh, I'd love to hear some arguments though.