Add a little bit of snow in your blog.This one is dead simple and faster (No images, no css, no nothing.only a few lines of js).

Download: http://sourceforge.net/projects/evocms-plugins/files/jsimplesnow_plugin/jsimplesnow_plugin.zip/download

Demo: http://eodepo.com/jsimplesnow_plugin/

There is also another more customizable jQuery Snow animation plugin at : http://forums.b2evolution.net/topic-21807
You can use that for more advanced options.