I use Zumodrive myself, which is very similar in nature to Dropbox. Both are excellent programs, I agree.
Tell me, what are the benefits of Zumodrive over Dropbox in your opinion?
Never used Dropbox, so I can't really compare the two unfortunately. In fact I didn't know Dropbox existed until Liz posted the link to it in this topic. I guess the main advantage is that everything is stored off-site, so you save disk space by not having to have the files actually on your computer for them to remain synced. Downside to that is that you need Internet access to get to the files if they're not already cached on your hard drive.
To be honest I only really use it for file hosting. Just copy and paste into my Z:\ drive, right-click "Zumodrive - Share", and give someone the download link that pops up. This is to replace Googlepages as my primary way of hosting files online for others to download.