WordPress Mobile is a plugin by Alex King that creates a mobile-friendly version of your WordPress blog, and automatically redirects visitors on mobile devices to that version of the page. You can see what it looks like on this blog by going to http://www.tinyscreenfuls.com/wp-mobile.php.
Here’s a screenshot:
On Windows Mobile devices, Pocket IE does a pretty good job of formatting WordPress blogs down to being readable (especially at lower font sizes). But, given all the attention on mobile web stuff lately, I figured I’d better install this plugin (I’ve known about it for a while), and point it out.