I’ve been using Contact Form 7 on all my WordPress blogs for a long time. Contact Form 7 can manage multiple contact forms, plus you can customize the form and the mail contents flexibly with simple markup. The form supports Ajax-powered submitting, CAPTCHA, Akismet spam filtering and so on.
So you’re worried about spam bots attacking your site. You must have heard of CAPTCHA. Maybe even implemented it with the hope that it will stop those spam bots.
I use Pidgin as my primary chat client. Pidgin allows me to login to MSN, Yahoo!, Google as well Google Hosted accounts all at once, thus ensuring I don’t have too many clients running at the same time to fulfil my chatting needs.