Is there a way to see some of the PlugIn effects previewed like the Presets are in Bridge?
I'm trying to see what some of the Distort plugin look like and Bridge just shows the file Icon. To save some time, I don't want to have to try each one in an AE project,
If there is a way to see all the preset/effects that would be great as well.
No, not possible. The files that have previews were created using a special script command to embed GIF files and JPEGs (app.previewInject, if I recall correctly). It's nothing that happens automatically. Check Ko Maruyama's blog (ninjacrayon.com), if you want to create your own previews. He did a quick tutorial at the time when this was new in CS3 and also has a script handy.
There are static images in the various effect galleries in After Effects Help. You can follow the links in the galleries to a description of each effect, usually with a set of before-and-after images.