If you do a lot of graphic arts, or photography, Digimarc offers the only major watermarking system that I’m aware of.  With a subscription you can track your watermarks, and even use Digimarcs backup system which is kind of cool.  As of now, the plugin only supports Photoshop and Adobe Photoshop Elements which seems pretty restrictive to me.

The system works, don’t get me wrong, it does exactly what it’s touted to do, and quickly - but the support for this thing is dismal.  I loaded the Photoshop plugin on my old system and as I recall it was a bit of a bear, I ended up fighting with it for a while to get it installed correctly.  Now that I’m trying to install it on my new system, it’s a no go.  I’m guessing this is a lack of Vista support.

Regardless of whether you can get the downloaded plugin to work, Photoshop CS3 comes with an older one already loaded and you can log your Digimarc ID into it.  It looks like something circa 1990 though, very retro if you know what I mean.

Anyway, it works beautifully, with minimal degredation of your graphic though you’ll have to play with the settings a bit to attain the best match.

UPDATE!:  I found the good drivers for this, if you need them contact me  at bunneh at pixelbunneh dot com or drop a comment here and I’ll send you a download link.  The correct files look much better, more like we’re in the correct century, though it does say it’s from 2005 :/