Right, no Linux desktop client at the moment. I don't think it would be especially difficult to make one, but we'd need enough demand to make the investment.
But having said that, we do provide WebDAV API. Every modern OS I know of, including Linux, can mount a file system over WebDAV. It is not very efficient, and doesn't have all the features you would get with a client, but at least you have access to your files.
Some people actually prefer to use only WebDAV, because that way as soon as you cut network connectivity the files are not accessible (security feature).
But having said that, we do provide WebDAV API. Every modern OS I know of, including Linux, can mount a file system over WebDAV. It is not very efficient, and doesn't have all the features you would get with a client, but at least you have access to your files.
Some people actually prefer to use only WebDAV, because that way as soon as you cut network connectivity the files are not accessible (security feature).