Since the mid - late 90's, virtue and other "spiritual" ideas and words have been gaining in popularity. Some are feeling outdated and stale - Trinity, Destiny, Hope, Faith, and Heaven all spring to mind - not to mention Nevaeh (blech). In the past 3 or 4 years, I've seen a resurgence of the more classical "puritan" style virtues on the naming boards and birth announcements - Verity, Constance, Amity, Temperance, and Prudence, i find these more refreshing and I quite life a few of them. While a lot of these are decidedly masculine or feminine, I feel that words are unisex.
Pax ("peace", I've seen this on census records for both genders since the 1300's, at least)
Trying to keep with the one's that haven't been mentioned as often on the naming boards and haven't hit the popularity lists too hard in the past decade.