Johannes, a regular follower and contributor to planetwater.org created a nice little tool that allows any Nokia cell-phone users to get a notification on their phone, as soon a new blog entry is posted to planetwater.org. The logo of this service is shown below:
All necessary information, including how to get things working on your Nokia cell-phone are provided on this site.
Thank you very much, Johannes!
update Monday; January 26, 2009: as Johannes points out, this is for a lot of phones. They just need to fulfill these requirements