The Dropbox installation package source has been released to the public via a GPL license. This means that even if we don't have installation packages for your Linux or Unix distribution of choice, you can still compile a version yourself.
tar xjf ./nautilus-dropbox-1.6.1.tar.bz2
cd ./nautilus-dropbox-1.6.1; ./configure; make; make install;
For specific distributions or to configure your installation, see the INSTALL file included with the source package.
As mentioned above,
nautilus-dropbox is released on a GPL license. However, due to legal requirements, we can only accept patches into our release if you release your patch into the public domain. Don't worry, we'll still credit you in the CONTRIBUTORS file included with every package. To submit your patches, contact us. If you want to develop on the Dropbox platform, check out our API by visiting our developers site.