Practicing my Google-fu, it seems they advise against that ON WINDOWS, as Windows never really caught on to symlinks anyway, and Windows+Dropbox may just gargle your symlink.
Even then, it just won't tell dropbox that stuff got updated, I think.
http://www.dropboxwiki.com/tips-and-...ommand_Prompts
Nevertheless, they work great on Unix-based OS's, and it makes a difference to ME where I keep it, so I'm happy. What can I say, it works for me.