Couple of things I’d like to remind here:

• It’s only at webpage: Twitter.com If you RT from webpage, those RTs aren’t shown anywhere else…(thinking seriously about implications for third-party services, and more importantly, for users themselves! -read below)
• If you are not Twitter friends, RTs won’t visible.
• You can undo retweet
• You can deactivate someone’s RTs, ie. if you unable that user’s RTs (not necessarily blocking) you won’t get the RTs in your timeline.

Battle lines are drawn over Twitter’s ‘new’ retweet feature. And here’s mine too: