We have updated our Free PDF viewer plugin. You can download via IDEA, http://plugins.intellij.net/plugin/?idea&id=276 or from http://www.jpedal.org/support_siIDEA.php (where the source code and some screenshots are also available).
Features of latest release are:-
1. Uses latest version of JPedal PDF library
2. Tested on IDEA 10
3. New thumbnail view and a nifty little page preview mode.
4. Commercial users have access to printing and multiple screen modes.
We have made it much more modular so it is much easier to control from your own code.
Let us know what you think!