Upgrade to WordPress 2.7 only after you listen to the teleseminar for Jan. 7, 2009 given by TheWordPressWizard. She will tell you, and show you with her action guide, how to backup the database, your themes and upload the new version! Go Now!
Let’s all report in by the end of next week. Also, let her know if the information was helpful.
A new version of WordPress is coming out. However before you update consider checking to see if your theme, host and plugins are going to work with the new version. Here is an excellent post about that issue.
If you are not the person doing the update then be sure to share this with your support staff. (Although, they probably know this already.)