The Mare Nostrum series starts this weekend in Barcelona, June 2nd and 3rd 2012, followed by the Canet en Roussillon meet on Wednesday 6th and Thursday 7th, and then Monaco next weekend the 9th and 10th.
The main site seems to be down for some reason, but the Barcelona start lists can be found here on natacio.cat and the Monaco start lists here, featuring loads of top class swimmers, including our own young Faroese guy Magnus Jákupsson in Monaco, ranked 7th in the 50 backstroke.