I have upgraded lesterchan.net  to WordPress 2.7 alongside with all my updated plugins. Please let me know if you find any bugs on this site by dropping me an email or posting it in the comments. Thanks a lot =)
The update is smooth and it only takes about 30 minutes. Not much compatibility issue here except I have to uninstall my WP-Sticky as WordPress 2.7 has already a sticky post feature built in.
I will create another separate post to highlight the updates to my plugins.