I think there is little need to worry about the "West" (Blair, Bush, etc) going off on a tear and indiscriminately bombing nations in the Middle East in a "Holy War" in response. The "West" has proven itself better than that.
However, I would imagine both overt and covert operations against "insurgents"
and terrorists will likely step up at least a couple of levels.
There will likely be "something to see" like the large scale open operations aimed at "al Queada in Iraq" and their cohorts.
It will be what you DO NOT see that will be what is really stepped up. The SAS and other British units, and US special forces, along with other nations quietly sending their elite forces into mostly covert operations in places you've likely never heard, and may never hear of. You won't hear much about it unless they happen to take out a well known major terrorist asset.
I don't think any of the nations truly united against terror can afford to take this lying down, and I doubt any of them will.
I would not be surprised to see al Queada et al attack soon in the UAE, since the UAE has been hitting them hard. They'll HAVE to hit back soon, and hard, for their own image and gratification.
With the announcement moments ago of the execution of an Egyptian official in Iraq, I look to see the terrorists further damaging support for their "cause" in even the most devout Muslim countries in the Middle East. They have become more and more indiscriminate in who they target, and openly target other Muslims with ever increasing frequency. If they continue, I think any support they have in the general population will shrink in direct proportion to their attacks on Muslims and Arabs.