In last year's Linux Admin Tips entry, I mentioned FUSE, the open source filesystem in Userspace project, and how it is used to mount remote file systems via SSH.
Here's a tutorial on how to install and use it on any Debian-based Linux distribution. FUSE is not restricted to SSHFS only but to a vast array of file systems such as EncFS and CryptoFS (encrypted file systems), ZFS, ntfs-3g and more.
I just wish that there's a nifty tool like MacFUSE available on Linux.