Hiring - Improve site speed and tweak plugins

I have an Atahualpa site (www.ourkingscross.org) in need of some cleanup. I can handle basic tweaks but I'm running up to my limitations.

Specific items include:
-- Improve homepage loading speed to avg. page load of <2 seconds. (It is ridiculously slow right now).
-- Fix Twitter widget. (worked intermittently and is currently disabled)
-- Fix calendar plugin and widget. We use Google calendar for the raw feed, but we're having problems with the calendar plugin properly updating events.
-- Several random image alignment issues.

If this project is handled well, there is significantly more work available on this site and several others (www.schatzmold.com, www.leadtestingseattle.com).