I have recently applied for a postdoc in the USA, and because I am on a different continent any interview that I may be offered will almost certainly be by videoconference. I assume that at postdoc level, nobody is going to offer to pay for an intercontinental visit for a second interview (am I right?).
There is some good advice here on interviewing over Skype, and indeed this is something that I have my own past experience of. Something I've noticed before is that while the formal interview itself can work almost the same way in person or by VC, one misses out on the surrounding interactions - chatter before and after, perhaps walking around the building, and so forth - which helps one to form an impression of the people, the place, and whether one wants to work there.
Are there any ways to get a feel for these intangible aspects of culture and personalities without a visit?