Hey, Google, if you do this, make it optional (at the discretion of the person using the tool).
Using ssl-based web tools sucks giant whopping buckets of snot if you are stuck behind a 26.6K baud modem line or other crippled internet connection (like any satellite-based system such as Starband, WildBlue, HugesNet - if you can get them to work at all!) The less you stick behind SSL, the better, for those poor people.
Yes, there are a lot of us who can't get to a decent broadband connection on demand. Please ensure that things will work, and work well, for us too!