The LBP dynamic theme (which has sackboy running on a globe against a background whose lighting and contents change to reflect the time of day) is gorgeous. I wish I could be there when my daughters (whose obsession with LBP is scary, though I limit them to an hour a day) see it. Its 3 bucks, so the price is a little on the high side, but for the LBP obsessed, its worth it.
I haven't formed a strong opinion of firmware update 3.0, but things seem to load faster than they did before and I didn't have a problem manuevering around in it.