It was a hard task to find the download link for the data dump of SE, but I've finally managed it. But after download I've noticed that the dump is far from complete! For example, a dump of The Great Outdoors is missing, which is very well established site, although still in beta.
Where can I find the complete set of data dumps for all SE sites, including betas and closed ones? I know that I can download dumps of closed sites finding their descriptions on Area51, but they must be somewhere aggregated, or?