it's not the official client from AgileBits, but it works very well.
This is how to get 1Password running on Linux
clone the source
hg clone http://hg.icculus.org/icculus/1pass/
cmake -DCMAKE_BUILD_TYPE=Release .(you might need to install these packages: cmake libxtst-dev libgtk2.0-dev libglib2.0-dev libglade2-dev)
create symbolic link from Dropbox to it directory
ln -s ~/Dropbox/1Password .
Run it by
check for updates by