Hi Dario, is your friend in Cork city? If so then Donnachad knows that area better than me. I mostly dive the area from the "Old Head of Kinsale" to Sherkin Island. This is West Cork. I sometimes go further afield too.
http://forums.deeperblue.net/uk-irel...ng-2007-a.html
Check out above thread to get some idea what's about. If you fancy a trip out in West Cork PM me when you're over here and we can meet up for a dive or I can tell you some spots to try.
Further west again, Huan knows the Castletownbere area well. He didn't dive a lot last year, but I've a feeling he'll be in more this year, and he's very clued in about what's happening.