The Blue Jays have a day off today. I bet he'll be back tomorrow. Maybe Gibbons will give him an extra day off and he'll play on Wednesday. I can't really see him being sat for much longer if it's not a serious injury.
The Jays have got an easier schedule over the next couple of weeks (TB, BAL, OAK, KC, CLE) and will need to continue the success they had in the Minnesota series over the weekend.
They still have an outside shot of contending for the division/wild card. If they're serious about it, they need to make a run now. Once September hits, their schedule gets a lot tougher. In fact, they finish the season with 13 games against BOS, NYY and DET. Those games aren't the ones in which you want to be making up the ground!
They've been riding Glaus for the last few weeks. Without him, their order is a lot thinner. They need him back now so I think we'll see him back ASAP.