So it would seem that any email that has been sent to me since about May 2010 has been sent to my spambox (which I don't regularly check) by an aggressive spam filter. Sorry if I didn't get back to your email - I didn't see it!
I plan to start going through the backlog tonight. As a failsafe, though... I have it set up now that any email you send through the contact form not only send to my main account for this site, but one of my personal accounts as well so I'll see it from now on.