A regular saver account with Anglo Irish paying 5% is one option (max lodgement of EUR 1000 per month). There are other similar Reg saver offers see the best buys.
If you want less restriction Irish Nationwide offer 3.75% on an instant access basis with no minimum bal and an upper limit of EUR 20,000.
Otherwise Halifax offer 3.75% on up to EUR10k and 2% on amounts from 10,001.
Nationwide UK pay 3.55% with a min opening bal of EUR2000 and upper limit of EUR 2mm.