Fantastic deal IMO from Lycamobile.
Ireland Plus - €15 per month:
- 20GB 3G Data
- Unlimited any network (including landlines) calls 
- Unlimited texts 
- Free call and text roaming in 18 countries including UK and US  
- Free calls and texts to Lyca numbers in Poland + Romania
I have to say, an absolutely brilliant deal, totally blows Tesco Mobile out of the water, specially as Tesco Mobile seems to be going down the drain now 
And add to all that very good rates for calling and texting international numbers.
 Seems to be 8,000 minutes calls and texts Fair Usage Policy, plenty IMO.
 Calls and texts, but not data, but Lyca also has very good value add on bundles for data roaming too:
 Tesco Mobile has started randomly cutting off people with no warning (phone just stops working) for "security" reasons, massive amounts of controversy about it over on the TM forum, people are extremely unhappy. Also customer support has gone to the dogs and their roaming rates are terrible (many people think they maybe against the new EU roaming rules, they have been reported to Irish and EU regulators!).
I've just moved myself and the gf from TM to this Lyca deal and very happy so far.