You should add a link to your main site on your blog. I arrived on the blog from the HN link having no idea what Dropbox is or what it does. I had to manually edit the url to get to the main page to find out what it does. Lots of users would be too lazy to do that.
Snap. Also, the tour thing doesn't load on the PCs here at work (probably the firewall), so I still don't know what it is! The site could do with a bit of simple plain boring old html text which tells us poor people behind firewalls what all the fuss is about :)
