FishBMC has received a handful of feature enhancements. There is now an optional persistence file, which enables faster initialization. Also, many optical tweaks have been incorporated, and the sound data is more completely used. You can download the Add-On here: 32-bit (outdated) or 64-bit (outdated)
If you prefer the repository way of installing, download this (64-bit only)
Still, only Linux 64-bit has been tested. Please report success or failure on other platforms to marcel at 26elf dot at.