I hadn't tried to sync a PPC computer in a couple of days, primarily due to the fact that I was out of town and the only PPC I had with me was a TiBook. As I brought it along for gaming, I primarily booted it into OS 9. In any case, on returning home earlier this evening, I fired up my Quicksilver. When the desktop loaded, Dropbox popped up prompting me to log on. I attempted to(knowing it likely wouldn't work) and saw the below screen. I'll try the above work-around tomorrow, but ultimately I think that using my Mini will be the ideal solution at least as long as SL support continues.