I Will Develop “Banner webpart”, which will display Image, which will change each time page is refreshed. Picture Library will be extended with fields to support priority, Count (no of times shown), URL Link, description, Expiry date, Start Date. Algorithm will be written to take in account, priority and number of time image is shown and dates.
Additionally, webpart can also be improved to keep count of number of times image shown and number of times image clicked
Webpart will be developed to work on SPS2.0 and/or WSS. Please see my details.Thanks.