Ireland are fine at loosehead with Healy, Court and Horan all decent option. Likewise they're okay at hooker where Best and Flannery are experienced and Cronin has lots of potential. The problem is at #3.
In the short term Ireland are screwed at tighthead. John Hayes is a spent force, Tony Buckley is a demon in the loose but rubbish at scrummaging and Mike Ross is an excellent scrummager but can't get into the Leinster team. How can Declan Kidney be expected to pick anyone other than Hayes when the alternatives aren't playing enough rugby?
Next season things could slowly begin to change. Hayes may retire which will give Buckley more time in the Heineken Cup and Magners League to make the position his own for Munster. CJ van der Linde looks likely to leave Leinster which will open up a spot for Mike Ross. Jamie Hagan should continue to develop at Connacht where he's a very good prospect and probable long term answer for Ireland.
For 2011, Declan Kidney's options are to pick Buckley for his ability around the field and neglect the scrum or pick Ross and hope he can deliver more consistently in open play. I suspect he'll go with the former option. Healy and Flannery look to have nailed down the 1 and 2 shirts.
Longer term I think we'll see an Irish front row of Healy, Cronin and Hagan. It could be 3 years before they establish themselves as first choice though.