Business Communicators of Second Life make note of a new museum exhibit in Second Life. What interests me is that instead of simply putting items on display - that is, after all, what museums do in three dimensions pretty well - the post says that the San Jose Tech Museum of Innovation wants "to encourage the re-thinking of museums, exhibits and to explore thenext iteration of 'the museum'."
That strikes me as a pretty good use of digital space, which makes experimental testing easy because the failures can be identified more speedily. It's a match between museum mission and method.
Business Communicators of Second Life also turned me on to a blog dedicated to describing the application of the digital arts to museum design, Museum 2.0.