These days a cleartext login isn't a great idea for any website and GC.com is no exception. It forces me to keep a sacrificial, non-premium account around for situations when I need to log into GC.com from a system that I don't trust (eg. a kiosk at a library, hotel or webcafe) and don't want to risk my real GC account's credentials from being sniffed off of the wire or via a keystroke logger on the terminal itself. Even then, that's only useful for searches; I still have to wait to get to a reasonably secure trusted machine to post my finds via my real account.
Note: if it's a backwards compatibility issue, you could always offer both cleartext and ssl-enabled pages and let users choose which one they prefer.
What's the likely timeframe for a secure login page? - Wash
P.S. Not intended as a troll post, just asking when it'll be an offering.