Also, check out http://www.ireland.com/events/st.patricks/2002/ for postcards, coverage etc. etc. and

http://www.bankofireland.ie/html/gws/webcam/index.html for a live real-time webcam of the parade as it passes through College Green in Dublin.

http://www.ireland.com/dublin/ and click on Live Views for a view over O'Connell Bridge and O'Connell Street.

Parade starts at 10:00 GMT and finishes around three hours later.

Enjoy!