How can i switch from wordpress [self hosted] 2.7 to 2.8 while keeping all my stuff?

My website is currently running on WordPress 2.7.
The newer version, 2.8 has just been released and I want to switch…and keep all of my settings, files, plugins, themes, ect.
Is there anyway to do this?
Thanks!

PS not sure if it is helpful but my url is: http:willwerblow.com

thanks!