A couple of small changes: we already force SSL for profile update page, private messages pages and login. I have extended this to image uploads and gallery as well, just in case you feel more comfortable if someone is not looking at the stream from your PC ;)
We have also changed our resources a bit, moving to our CDN provider (current MaxCDN) but soon to CloudFlare since they have a closer POP - if they can fix a problem with their DNS...
Using the CDN for resources will allow for less bandwidth utilisation - currently we have about 95% cache hit on the existing cdn.geekz1.com and hope to get similar levels in our other subdomains now on the CDN.
The closer MaxCDN is about 200ms away, while the closer CloudFlare POP is only 40ms away. This will eventually make things event faster - although we think New Zealand's transparent proxies as implemented by most large ISPS do a good job of being a "fake CDN".