Ask HN: Personal email hosting service on the cheap?

Now that google charges for google apps for small business, how do people go about hosting just an email address at their own domain on the cheap?

Many of the services I've seen (rackspace, fusemail) require $10 per month. Google apps for small business is approx $50 per year, There's got to be something better / cheaper for just email. (ideally sub $20 / year)

I'd like to find a reliable, well known, add and spam free, hosted imap server that allows multiple addresses (aliases) that point to a single mailbox.

Suggestions?