Google has halted downloads of Google Earth for now; it seems that their plan was to limit the number of users of the new, beta service. It’s something they’ve done before with betas — think Gmail — and is probably related to the capacity of their infrastructure. They say to keep checking back to see when downloads open again. In the meantime, if you haven’t downloaded a copy yet, you’ll have to look on with envy as others report how cool it is — just like us Mac users.