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Nautilus SVN, the SVN client for linux had moved to RabbitVCS a few months back. From what I have read so far, the new client, while plugging into the old Nautilus manager, performs much better and does not hang up when the number of files to manage is on the rise.

RabbitVCS differs from Nautilus by attempting to have a pluggable interface for many types of source control systems. So SVN is just the beginning. You can check out the screenshots and install it on your favorite linux distro.  Here are a few teasers

RabbitVCS:

Commit with the Rabbit: