I don't know if it exists an easy way, as I haven't tried it myself. I am however in a similar position where uploads are becoming rather taxing on bandwidth and disk space.
@bsdmike: maybe you could request / inquire about a cdn extension for uploads? there are cheap Amazon S3 alternatives around which would be excellent for this particular purpose, and if S3 isn't your thing, maybe you could request additional functionality such as sFTP/FTP and you can create your own pseudo-cdn, or at the very least some type of offloading...
That's just a thought.
bsdmike wrote:I am using hostgator and I am getting dangergously close to the 100k inode limit..nearly 18 gigabytes of pictures. Is there any easy way I can move those pictures, say, to another cheap server so my backups don't stop?