The official Twitter for Android app has been updated yet again to come closer to the feature improvements that have been made in the web version of Twitter. Tweets in the regular stream now include previews of any media attached to the tweet. Pictures, videos and articles will show up in-line with the tweet so they can be easily accessed after the preview. Several improvements have been made to the search functionality as well -- there are media previews in search stream tweets, and you can now get a "Photo Stream" to see what's happening at a given moment in pictures.
If you haven't given the official Twitter app a look in a while, you may want to give it a try. A lot of improvements have come in the recent updates. Grab a download at the Play Store link above.