We're getting close to the first true beta release! Flam4 is only missing a handful of key features now.
As of version 0.35, the standard palettes from flam3 have been added. Also, Variations 0-48 have been validated, with all except for 12 and 33 passing. Variations 49-53 still need to be tested, but I'll need sample flames and reference renders to do that.