Dragon Mobile Assistant is something of an odd app for Android. It doesn't really take advantage of the deeper integration that Android allows, so it only gives the options for more basic commands. It is nice that it hooks into other apps more deeply, like IMDb, Yelp!, OpenTable, and others. But, there are better voice command systems on Android, so unless you find Nuance's speech recognition markedly better than Google or Vlingo, it may not be worth your time.
Still, it is nice that Nuance added support for older OS versions, because Android 2.3 Gingerbread does still make up about 50% of the Android ecosystem.
If you do want to try the app, it's available for free in the Google Play Store.