Based on what I read, the Logitech C910 is the only 3rd party webcam that is compatible with 2011 model Panasonics - that includes the ST30.
Good news for me, I have that Logitech Webcam.
Bad news for me, my Panasonic is model 2010 (2/20 series).
But good news for all, the Logitech is much cheaper than that proprietary Panasonic Webcam and is capable of very nice high def quality video (if your bandwidth allows).
can I use LG Skype Camera AN-VC300 with S30 series?