Finally BuildOTTD has reached its final stage of beta by releasing 1.0-RC1. Hopes are high that this will be the only release candidate needed (you can always hope, right?).
Head for the download section and grab the latest and the greatest :)
This is the new home of BuildOTTD.
The old home is here: http://www.tt-forums.net/viewtopic.php?t=31823
More info on OpenTTD here: http://www.openttd.org/