Since the source code of the kernel is not available yet, most of the items in STweaks will have no effect.
What is working: ■charge boost (for AC: up to 1200mA, for USB: up to 900mA) ■Auto NTFS mounting to /mnt/ntfs after attaching an NTFS formatted USB stick ■Audio enhancements, call it scoobydoo sound, eargasm or whatever (fully functional in v1.6b3) ■Overclocking (changes 1400 step to 1500 or 1600, available in v1.6a5) ■Some tiny script based tweaks…