I tried Dolphin Jetpack, which is said that it makes Dolphin browser extremely fast.
Since I replaced Nexus One with Galaxy S II (SC-02C) several month ago, I had a fun by tweaking various settings and installing various applications.
When the brightness of the screen is set to the automatic at CyanogenMod 6, I feel a little bit dark. If you want more bright, it can be set from CyanogenMod settings → User Interface → Automatic backlight.
CyanogenMod 6 for Nexus One has a 720p Video recording function. I tried it.
According to a Movie Inspector of QuickTime, It's about 23 fps.