SocialList allows you to control more display parameters from simple pop-up menus than anything else out there. You can position the icons anywhere you want; you can exclude it from the Front Page and from static content, manage the size of the box, etc., without needing to muck with the PHP file.
The downside is that you have no control over which bookmarking services show up in your display, nor over the order in which they appear. The icons are imported from the SocialList website, and the order in which they appear is a function of the Javascript that runs on that site. For example, we want Reddit to appear among the first 9 icons displayed, but we have no control over that.

a great plugin, easy to install and get up and running but:
1. no place to put support issues.
2. when you intall it into joomla, you must first unzip the file and rename the zipfile inside to a zip extenision.
3. you do get one error when clicking on certain links. Do not know how to fix it, it is listed below:
Fatal error: Class 'ContentHelperRoute' not found in /plugins/content/sociallist.php on line 78

This is the first time i have written a review... I am amazed at how easy to install and configure this was... I have tried to install many of the other 1.5 social network plugins... but this was the first that worked "straight out of the box" ... and after re-jigging it (just for interest, not out of need) I realised I could easily make it even better.

Nice simple setup. Size is easily customizable.
Ajax? Pop-up for additional sites size is easily customizable.
Clean "More" link opens pop-up to select from any of SocialList's site options. Well done!