Please add HTTPS, please add HSTS.
Some clarification on password stealing: Essentially every password breach has been via phishing or cross site scripting. The passwords are hashed, and cannot be (trivially) recovered from the database. Logins, however, are almost certainly handled as plain text. Hypothetical, a sort of challenge-authentication setup could be implemented, but it would be of relatively low security compared to just using HTTPS.
The presence of HTTP content does not render HTTPS useless. Most of the content anyone would be served over HTTPS, such as logins, PM conversations, and IP data from staff tools.
Random images hotlinked from a non-HTTPS server is not something we have strict control over, though I guess we could disallow such links in the first place.
I have previously requested this, but the developer who had been working on it had difficulties making it work and eventually left.
I would really, really, really like to see HTTPS on the forum.