I really dislike the current style of smilies, hopefully people agree with me there. They're basically MSN's old smilies with bad anti-alias and some horrible custom ones that don't fit in with the rest at all.
I've made some smilies myself for use on forums, blogs, software etc. They're free to use and fit together well. I recommend using those if only for the potential copyright violating current ones.
Here's what they look like;
<img src="http://www.kenney.nl/wp-content/uploads/2010/04/smiley_preview.png" border="0">
Link to download over at DeviantArt; http://fav.me/d3d82js
I can do more custom ones on request! :)