I've been wondering the same thing. I hope we can have April 2011 General Conference in the Gospel Library soon. It's already available in audio and video through the Mormon Channel app.
April conference and much more will be available within a couple of days with the release of version 2.0 of Gospel Library. We are fixing a couple of last minute bugs but look for the update on the market any day.
We released version 2.0 of Gospel Library today that will allow you to download the latest version of conference. You can download it in the Android Market.