Want to stick it out with the native app? Tough. BlackBerry says the old version will stop working on March 31st, meaning the web app replacement will be mandatory almost immediately. In this scenario, something is better than nothing, although it's hard to shake the feeling that BlackBerry is just saving face here. Some people do swear by Facebook's mobile site though, because it drains less battery than the official iOS and Android apps. So maybe, just maybe, this will actually be an improvement?