Note that in the old solution some of the links doesn’t work (Newsvine for example) and others only half-work (Digg) - check and see for yourself!
This Is due to old links, and to the fact that there is no Special Character handling in the old solution (Which is text editor based). GetSocial takes care of special characters automatically (try doing this with replace!).
Btw, GetSocial also provides additional features such as automatically assigning mirrors for the icons, and optimized icon files so that it can handle many users (you don't need to upload any file yourself).
All I'm saying is: don't be so conservative, give it a chance. It's free!
(GetSocial - Social Bookmarking for WordPress.com)
(You can download GetSocial at http://www.hillelstoler.com)