l0st451

Hello all, well ill start with what I do have working. A form passes an argument over to a php script, this script then scours a mysql database to find any matches based off of the argument. If a match is found it echo's out a valid string of XML, it can find one or multiple entries. Now my problem lies in after the initial feed creation. Example, if i'm storing information about a 'seller', and this seller uses their seller id as the argument to pass the initial creation of the feed would retrieve all of the data specific to the seller and put it into a nice rss feed. now I am having trouble updating that feed automatically with the seller specific data. Because my database contains information from a number of 'sellers' i cannot just dump them all out; i just want to add, whenever a new item gets introduced, the seller specific data to their rss feed ie their live bookmark. Any ideas?