I don't make a secret of this fact. I don't include my email address on my personal (non-business) cards and ask people to send me a message on twitter before emailing me. It feels like I always have too much email. I have more unanswered emails in my inbox than I'd like to admit. The more involved in projects and community initiatives I get, the less time I have for email, but the more email the new responsibilities create.
Email has become a part-time job for most people - many employ part-time help to triage their email.