August 2015
It seems that for the moment the Opensim-rig is missing in the nightlybuilds. So I prepared a PortableApp-package (for windows) containing an older version of MakeHuman, together with blender-portable, both are customized with the mhx2-files and makewalk that you will need for the following tutorial.
EDIT: New Version (March2016) Download: http://bit.ly/1QGuB0U (526mb), including Manuellab and booltool
You want to create more individual avatars? A nice feature is the 'expression mixer'.
First model your avatar as usual. Then go to the expression mixer tab and use the sliders to add more details.
Save the created expression and your character. Export your character with mhx2 and A-pose. Make sure that you selected 'low poly' for the eyes and the Opensim-rig. You will find the mhx2-file and the textures in the V1-folder in the MakeHuman-folder in your documents.
Now open Blender, import your mhx2-avatar. Follow the hints in the illustrations. Open the makewalk-tab, set T-pose, hit 'current pose>>>' too and apply with 'Ctrl+a' the change to the new pose.
Next step is to change from posemode to objectmode. Then hit 'a' to select all, open the right toolshelf and rotate the avatar. Ctrl+a to apply the rotation.
Export Collada (.dae) the way you see it in the illustration.
Upload, done! (Hope it works for you )