TweetDeck is also available for PC and Mac... which is what you are seeing, assuming you are talking about when blog posts are tweeted. It's not from iPad, or iPhone.
Yeah that would be kevin, he just got it. There are a lot of blackberry users that use them for business and have iphones as the personal one. This is the best blackberry site, out there, but i have to give props to my man michael at blackberryempire.com. They are up and comming and rocking it already. Check em out