Add Daily Agenda to your Gmail
Saturday, April 22nd, 2006
Tech. Life. Blogged. has a post 
that explains how to add the Agenda from your Google Calendar to your Gmail web interface using a Greasemonkey script in Firefox.
The instructions are involved but not technically demanding.
And the result is useful:
You can only have one calendar at a time loaded in this way and if your calendar is big the reloading will slow things down (a little).
Tags: agenda, Apple Mail Tips, calendar, FireFox, GMAIL, Google, greasemonkey