The alternative to flash black is basically ssh into the apple tv and install the add-ons yourself. Process goes like this
Free method
1. Jailbreak with Seas0nPass
2. Install nitoTV through ssh (google it)
3. Once nitoTV is installed, install XBMC from NitoTV menu
4. Find add-ons (a simple google search for ATV2 XBMC add-ons will give you tons of results but some of my personal favs are Navi-X, Icefilms, Free Cable, Canada on Demand, SportsDevil, Veetle, Crackle, etc)
5. Install add-ons through FTP client such as Cyberduck or Filezilla (I use Filezilla but they are pretty similar). Again, interwebz is your friend and the process is not hard at all.
6. Enjoy your content
Pay Method
1. Jailbreak with Seas0nPass
2. Buy and install ATV Flash Black
3. Once installed, you can simple go to Maintenance=>Manage and install nitoTV and XBMC (this eliminates the need to ssh). You also have other add-ons that specifically come with ATV2 such as Couch Surfer Pro which is similar to Navi-X.
4. Find add-ons (a simple google search for ATV2 XBMC add-ons will give you tons of results but some of my personal favs are Navi-X, Icefilms, Free Cable, Canada on Demand, SportsDevil, Veetle, Crackle, etc)
5. Install add-ons through FTP client such as Cyberduck or Filezilla (I use Filezilla but they are pretty similar). Again, interwebz is your friend and the process is not hard at all.
6. Enjoy your content
No experience on the airplay so can't help you out there.