First of all good job, the rSAP app is working very good and the PhoneBook app solved my contacts sync issues.
Now I'm trying to make the DUN plugin to work and according to documentation it's necessary the ppp_async.ko kernel module into the /system/lib/modules directory but in CM11 isn't.
The question is, can you, please, compile the module for the CyanogenMod 11 ROM? (I'm using a S3)
I hope I'm making the right question cause you haven't kernel modules for any CM...
PS: In the installation section of the DUN plugin you made a mistake in the word "directory" in the description text under Install Files