We have to hand it to Seesmic: its Twitter app for BlackBerry has grown since an unimpressive first attempt that did little more to replicate the product's desktop glory than sketch out a basic Twitter client. Now, Seesmic is filling its app in with some Twitter power features that have become mandatory for serious third-party Twitter apps.
You can now retweet a post verbatim that someone else originally composed, or edit it by choosing to "quote" instead. The app supports your Twitter searches and lists. Like Ubertwitter, Seesmic for BlackBerry now includes a preview of a picture embedded within an opened tweet. Good. Now you can slake your curiosity without having to leave the app or wait for a full-size image to load in the browser. The same goes for links leading to Google maps.
Deleting a post you penned is another feature to crop up within Seesmic for BlackBerry. Thanks to Seesmic's new-found support for BIS-B (BlackBerry Internet Service Browser), a mobile Internet network hosted by BlackBerry-maker RIM, Seesmic can still run without a Web connection.
Though there are still some worrisome kinks to be worked out (for instance, our quotes showed up in the Twitter.com timeline, but not direct retweets), Seesmic has progressed enough since its earliest days to warrant further inspection. After raising itself from a C to a B, Seesmic is on its way toward becoming a stylish Twitter app in the top of its class.