Last I herd there has/will be a travel tax introduced in Austria and that may be behind the route being dropped. BHX has also lost Porto for summer 2011.
In regard to EI route. There was about a 50% increase in passengers transferring onto US flights from Europe and the UK through Dublin last summer. So they may be some hope if passengers do fly to the US. I would expect the route to be reduced to 2 daily next winter if it's still around. It was only a matter of time before Ryanair went back to 3 daily.