MT Tags, Keywords, Categories

Prior to MT3.3, I was using a plugin to automagically convert keywords into categories, and basically using keywords as tags. now I am trying to switch to the mt3.3 official tags feature, but i’d still like the feature that autoconverts tags into categories. i just want one set of descriptive words which gives me the features of tags and categories. is there a plugin that keeps tags and categories in sync?