Looks like there's a new reason to use the original Twitter app rather than downloading a spiffy 2nd-party client: Twitter has just announced a new update featuring much-needed push notifications and multiple account support.
The update will allow users of the original app to instantly receive Twitter updates – no matter what they're doing on their phone. And folks who have both work and personal Twitter accounts will now be able to switch effortlessly between the two without logging out.
Other improvements include a new appearance and plenty of bug fixes.
Source: Twitter Blog