I clicked on a few random shows and it looks sort of bleak. MSG seems pretty decent (not sold out but a lot of lower sections gone) but others seem like they have a ton of seats. They seem to pushing full steam ahead - they're doing that audio submittal thing so that seems like they're still planning on doing the shows.
i will say just looking at the concerts we just bought tix for with 3 other random artists (demi lovato, adam lambert, and collective soul), I'm seeing the same thing across the board and in a smaller venue! People just aren't buying tickets like they used to...not sure if it's the economy, gas prices, lack of travel because of the way the US right now or all of it and shows are still going on. Maybe they'll move people down and/or cancel the really empty ones or maybe they'll fill closer to the date or they'll move the venue? I don't even know!