Currently WordPress 2.9 is in Beta 1 stage and Earlier I was reading a post at Yoast – Geeky bits in WordPress 2.9 which outlines the New features being introduced in the WordPress 2.9 version. And it provides detailed information about some of the New Features in WordPress 2.9 like Support for rel=”canonical” tag, enhancement to wp_query, upgraded TinyMCE editor and much more.
So If you are a WordPress Developer or beta Tester of WordPress 2.9 you might want to read up the Geeky bits in WordPress 2.9 by Yoast. And By the way there is a WordPress Plugin ‘WordPress Beta Tester‘ which would upgrade your Blog to latest Beta release in case you want to get your hands dirty with the beta testing.