Aer Lingus website
 

I just happened on it this afternoon and they did a massive overhaul to their site. Have the whole bmi look now. The booking engine seems really good because you can see exactly what each sector is costing you so that you can adjust accordingly. Although it has fare rules, it does not give the fare code. Bad move, EI. Need to fix that. And they seem to have pretty dramatically dropped their fares. That is a nice touch.

Ah, yes, see here for further discussion on this one...