Today's national daily Publico reports that in the last quarter of 2010, Ryanair, for the first time, outstripped TAP, as the largest carrier of passengers to and from Porto Airport.
See: http://goo.gl/wzTly (in Portuguese).
This is good news, but it should engender a "Warning, Will Robinson!" moment, given that it is old news that no airport should become so dependent on one carrier.
Let's hope Transavia, Easyjet etc. consider expanding their operations from Porto because if Ryanair suddenly has a "Valencia" moment and decides to cut flights or move/close its base in Porto, the economc and job implications would be substantial.