Hi
I have a suggestion which I personally would find helpful. As you relese new versions of each of the templates can the zip file have the version number on it, for example rater than tpl_it_paradise which is the current way it could be tpl_it_paradise-1.5.0.
I have used Rockettheme for years and when they started to release the verions numbers I found it very helpful as I could upload templates from my stored ones and know I had the latest version.