Ferrari are the team that most people have eyes on in Mugello, with them bringing parts to assess the faults of the F2012 and with an eye on a potential F2012B being used in Barcelona. Ferrari decided to do all of it's morning running on a baseline setup and so when the rain came it stunted the chances of us seeing a big overhaul of upgrades. You will note however they are using a piece of bodywork below the exhaust that now droops away encouraging the flow to move downward quicker (Mugello top, Bahrain Below)
McLaren are another team that have concentrated yesterdays test time on a baseline setup, you can see from the amount of sensors on the nosecone in the picture below though they are interested in what's happening in and around the centre of the wing and the wing pylons.
Mark Webber hailed this test as a pivotal moment for RBR as it could help to decide the course of the championship moving into the European section of the season. Again they were using the Sauber-esque ramp exhaust system for testing they used in Bahrain and seem to be concentrating their efforts on getting data from this area (as seen in the picture below)