I like it in principal, but it uses a *lot* of resources on my machine.

I have 2G of RAM and 2G of swap (I had 1G of RAM when I set up the
machine, so I used the old rule of doubling it). With dropboxd running
and dropbox activated, nautilus grew to about 1.3G resident, more
virtual, and I soon was using all my RAM and 1G of swap (I think
that's all that can be used with 2G of RAM, but I'm not certain). The
load went up to about 3.5 and hovered there, and the system, which is
normally snappy, became sluggish.

I tried it on an XP machine with 512M of RAM, and had similar results.

I also made a mistake and filled up my 2G of space. No problem I
thought, I'll delete the unneeded directories, and as it syncs, they
will be removed from the account. Wrong, after I removed them, they
were restored from the account to my machine, and I was still using 2G
of space. So I tried in Windows, in case it worked better there. It
didn't, same result.

So I thought I'd go to the web interface and deleted the unneeded
folders. I soon discovered that you can only delete and purge one file
at a time with this interface, you can not remove a folder. I couldn't
believe this, so I checked the forums, and it turned out that this
feature is one they've been promising "real soon now" for at least 6
months.

If anyone has any recommendations, I'd love to hear them, as this
seems like it would be a very useful service, if I could get it
working properly.