Yes, I installed after I read your first post. But it's an earlier version that does not have support for plugins (i. e the openoffice- plugin). But maybe someone can update the version in the repos (I don't know how to do that).
After hours of puzzling I managed to get that beta openoffice-plugin for JabRef up and running in my Pardus 2008 system.
1) I installed the JabRef 2.4.2 version by the (yet unreleased) pisi package that is created by the code listed in my posting above (however the updated pisi package will appear within days in the contrib-2008 repo, so a bit of patience is the preferred way
2) Once you have JabRef 2.4.2. installed, download this plugin .jar filehttp://jabref.sourceforge.net/plugins/net.sf.jabref.oo.ooplugin-0.1.jar
3) Then in the Konsole put it at the right place in the plugins folder you create first.
sudo mkdir /usr/lib/jabref/lib/plugins
sudo cp /path/to/downloaded/pluginfile/net.sf.jabref.oo.ooplugin-0.1.jar /usr/lib/jabref/lib/plugins
4) After that once you start JabRef if all went well the Plugins entry in the menubar of JabRef is no longer greyed-out and show openoffice panel plugin, which you can select opening a panel at the left side of your JabRef GUI.
5) Now you are almost there. You should hit the button Connect to let JabRef find your OpenOffice suite, however it will return an error message untill you have imported at least one style file, I will attach that file also. (NOTE delete .txt extension, I only added that because .style extensions were not allowed as attachment here in the forum!
Thereafter hit Connect and things should be up and running (if not select Manual Connect and specify the paths to your openoffice files, in my case Connect automatically worked and I did not have to use Manual Connect).
I pressed the button "Select Writer document" once, and then pressed the cursor in my Writer document once (do not know whether this is necessary when only one Writer document is open at that time).
Then...select a reference from your reference list and hit the button "Cite" or hit the b utton "Cite in text" and it will appear right away in your Writer document (i.e. you perform the action in JabRef and the citation automatically appears in Writer without having to copy/paste import or export or so).
I guess creating a button in your Writer bar that right away opens your JabRef window would be nice, and come a bit closer to Endnote/Word resemblance, but I have never tried creating such a shortcut in Writer.
PLEASE NOTE THE LIMITATIONS OF THE CURRENT DEVELOPMENT VERSION OF THE PLUGIN:
The OO plugin is in a very preliminary state, and the reason it is being distributed at this stage is to allow others to test it and give their feedback.
* Make sure to save your Writer document in OpenDocument format (odt). Saving to Word format will lose your reference marks.
* There is currently no support for footnote based citations.
* The cursor may be poorly positioned after inserting a citation.