I switched to GMail during my trip to Europe, and overall I like it, but I just ran into a nasty bug. Not with GMail itself, but with the Textarea Backup Greasemonkey script: the script “backs up” and therefore fills in the hidden Cc: and Bcc: fields, resulting in emails addressed to one person going out to all sorts of other people. Not what one wants *at all*. So if you’re using Textarea Backup, be sure to add an exclusion for GMail. See http://userscripts.org/scripts/show/7671 and search for gmail for further detail.