I recently learnt about the Software Quality Assurance and Testing beta site, after seeing it in the footer at Board and Card Games. When trying to recommend it to a friend however, I discovered that it is not included in the footer for Stack Overflow itself (the only site he uses).
On closer inspection, it seems that the Stack Overflow footer has far fewer sites than the equivalent footer on a beta site.
Is this intentional? What's the motivation? It seems to me that Stack Overflow would be the ideal place to advertise the existence of a software testing site, or for that matter, fledgling beta sites in general.