There have been several question about the process of migrating Stack Exchange 1.0 sites to the Stack Exchange 2.0 system. I thought it might be useful to create a list of Area 51 proposals that are migration candidates, i.e. have a posted comment along the lines of "this is a replacement for x" where x is a Stack Exchange 1.0 site.
I have no access to information that could tell me definitely that a site will or will not be migrated. All I can do is list those for which a migration has been suggested. There are a number of other proposals which overlap existing Stack Exchange 1.0 sites but I've only included the ones where the link between proposal and 1.0 site was mostly unambiguous.
I apologize for any errors I might have made. I also have not looked at every proposal on Area 51 so I've probably missed some.
Phase: Launched (beta seeded with migrated content)
Phase: Launched (beta not seeded with content from a pre-existing site)
Phase: Public Beta (actually migrated)
Phase: Public Beta (not seeded with migrated content)
Phase: Commitment (proposed seed candidate offline/moved, migration unlikely)
Closed on Area 51
Deleted from Area 51
The decision to migrate a site doesn't usually come until after the proposal is nearing completion. Proposals are defined by the Area 51 community and there's no guarantee that the proposed site will develop in a way that is compatible with the SE 1.0 site. Also, the site itself has to have sufficient traffic to qualify as a Network site to be migrated. Finally, these are privately-owned systems and they are under no obligation to migrate their site, even if there is a compatible proposal. Most site owners take a wait-and-see stance when there is a similar site proposed.