The "new" Twitter?

..so I wonder what this is about? I'm sure there are major advertising dollars involved, hence the need to "improve" so to speak, but do the corporations who have ads via Twitter, have them on individual Twitter applications (like some may hit Echofon and others hit Ubertwitter) or do they submit it to Twitter.com and are they dished out to all the Twitter apps?..To have a new look and what not is always, well, most of the time it's always a great thing..I think they need to focus on making it so we never see or get a tweet from some random spam bot or never see that whale again..and plus, who really signs on via the web anyways?..