New update from Inyo Natl Forest:

4/14/2012 There is no vehicle access via the Whitney Portal Road,to the Mt. Whitney Trailhead. Experience with snowshoes, crampons, and ice axe is essential. Recent, heavy snow on top of existing snow and ice may create avalanche hazards, and makes conditions that even experienced winter mountaineers should approach with caution. Not recommended for inexperienced hikers until conditions improve. Snow and ice will be deeper at higher elevations and on north facing slopes. Obtain a current Weather Forecast and Avalanche Advisory before visiting. Do not underestimate the severity of winter storms.

No change from the 3/30 update...no idea what it's actually like up there - any locals or people who were just there want to give an update?