Earlier this week, ADV announced that they've licensed Clannad for release on DVD. They'll release it in box sets of 1/2 a season at a time, subtitled only (no dub), and the retail price is $39.99.
Source
I notice that the pre-orders are $29.99 on rightstuf.com though, set to come out as early as the 3rd of March 2009! ^_^
ADV haven't been doing very well as a company as of late (directly due to the "credit crunch"), and can't afford the expense of producing a decent dub. I can't help but feel that it's turned out well, despite their troubles. It means that they are releasing a series like this with a fast turnaround, no delay waiting for individual DVD volumes, and it works out much cheaper too. ^_^