Lucas has posted a very interesting paper on the Amis blog titled "Publishing Data Manipulation as an RSS Feed - using Oracle MOD_PLSQL and Flashback" that describes how the Oracle HTTP server, mod_plsql and PL/SQL can be used to generate an RSS feed of changes that have occured in the database.
This is quite an interesting idea and one that sounds quite useful to get the data where it is needed quickly. Having alerts sent straight to a newsreader is a good idea in principle. There are issues of course such as the need to have a HTTP server in the database and the security of the feed itself in terms of data leakage and also potential for alteration.
I talked about a similar subject when i worked at Pentest, that is the useof timestamps to detect changes in database structure. The paper was called "Have your objects been tampered with?"