Mailing the story:

After 2+ years of work Filipe Coelho finally called it a day and released the first stable version of Carla — an audio/MIDI plugins host for Linux and Windows. Carla is omnivore indeed: it loads both LV2, VST, DSSI, and LADSPA plug-ins, and beyond that it supports GIG, SF2, and SFZ samples via FluidSynth and LinuxSampler.