Skinable smilies and icons

I saw this on the MT Forum today in a post that was a couple of months old (not sure how I missed it!). Skinable smilies [Click link for English Version at top and then scroll down] is a very neat idea even if you don't skin your site. The smilies are transparent gifs with the background color controlled by CSS to match your site (or your various skins.) He has also just come out with the same idea for Skinable Navigation Icons. [Can't find an English version for this but same principle as the smilies - download the zip with the images and use CSS similar to the smilies example.]

I might have to try this. I've never really been a smilie person, although if anyone reads my blog, they know I use a lot of the old-fashioned kind! ;)