WordPress Thanks Plugin

I need a WordPress 3.0 Thanks plugin with the following features: (1) It should work perfectly with cached posts and pages of WP Super Cache for my theme. (2) Any guest or logged in user can click the Thanks button at the end of each post, each page and each comment. (3) After a Guest or User clicks the Thanks button, it should immediately show (or on reload) their names below each post, each page or each comment, even though WP Super Cache is on. For example: User1, User2, User3 and 10 Guest(s) said Thanks or 2 Guest(s) said Thanks or User3 said Thanks, depending on who have clicked Thanks. (4) When clicked, the Thanks can be added by Ajax (no page-reload preferred like Facebook Like) or with page reload, depending on which one works better with WP Super Cache and which one is lightweight. (5) The code and js should be as lightweight as possible. It should use only one database query (or minimum queries) for the Thanks link below a post and all of it's comments. (6) The programmer can work on own server and deliver the files.