I heard about the Banana Pi in Linux User and Developer magazine. I was intrigued by the increased RAM and faster processor compared to the Raspberry Pi, especially since the Raspberry Pi is sluggish from time to time. The Banana Pi also has a SATA port which helps overcome one of the Raspberry Pi's greatest limitations, it's Input Output speed which is limited by the SD card. My Banana Pi arrived with today and I have already started creating HTPC media server guides for it. If you don't have one already, they are very affordable (around $50).
I have already installed NZBGet, Sonarr (NzbDrone) and SickRage. I can tell you the lag on Sonarr or SickRage on the Raspberry Pi does not exist on the Banana Pi. I installed nZEDb on the Banana Pi as well and it was able to index more groups than the Raspberry Pi. Once the Banana Pi SATA cable arrives, I will be connecting an SSD hard drive to it to run Raspbian or Bananian and connecting a 2 TB external hard drive for storing media. This thing is going to fly! (See Raspberry vs Banana Pi Benchmarks)
The arrival of the Banana Pi does not mean I will be neglecting the Raspberry Pi, my ultimate Raspberry Pi media center guide just needs to be proofread and then it will be published. I will of course update it in the future as software updates are published. My current plan is to setup Raspbmc or Openelec on the Raspberry Pi and use it as a media center connected to my TV. The Banana Pi will take over downloading duties and stream through DLNA straight to the Raspberry Pi. I will probably be using the iPazzPort on the Raspberry Pi running XBMC Kodi because of its full keyboard, for my significant other's TV she will get the infrared remote.
Edit: The Banana Pi Media Server Image is now live
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