OSXFUSE seems to work. I just downloaded the two OSXFUSE and SSHFS packages from http://osxfuse.github.com (the links are on the right hand side), and ran:
sshfs user@host:/dir /mnt/somelocaldirectory
EDIT: if you want a GUI, you might want to try sshfs-gui, though I haven’t tried it myself.
Personally, I’d use Cyberduck, though it doesn’t technically do the same as what SSHFS does, but maybe it’s enough for your purposes. It will let you browse files that you can access via an ssh connection, and seems to have options for editing them as well.