Update 20110926: In Fedora 15, you can just install subversion-javahl-1.6.17-1.fc15 from Add/Remove Software tool, much easier than the method described earlier. 🙂
When trying to run Subclipse, I got the following error: Failed to load JavaHL Library.
To get JavaHL loaded for Subclipse on Fedora, I had to first register on Collabnet before attempt to install JavaHL rpm from this location. Once installed, I had to run export LD_LIBRARY_PATH=/opt/CollabNet_Subversion/lib
on the command line before running eclipse.
This above tip is the result of combining the howto from this and this page.