Prior to their IPO, Twitter is adding to their mobile technology.
Twitter today shipped an updatethat adds in-stream video and image previews to the main feed in its iOS, Android and web apps. Previously you would have to tap on links for images via Twitter or video service Vine. Now you can see them right in the feed.
At this point, the previews will just be for Twitter photos and Vine videos, though we can imagine that expanding to other formats. Not to sound too toot-my-own-horn-ey but this is the way that Twitter has been headed for some time, as I noted late last year.