Would really like to see the configurable retweeting syntax options from Tweetie for iPhone show up in Tweetie for Mac as well, even if only as a hidden preference for those who particularly care.

IMHO, the problem with the current "via..." approach is that it's more confusing since it makes the re-posted tweet sound like it's coming from the originator. The RT syntax has the advantage of making it clear at the beginning that these are somebody else's words.

For example, I had a straight male friend recently re-tweet a post from a girl about a cute guy. It seemed really weird for a moment until my brain processed the "via" line and realized that it was a re-post. :)