Yeah, some of these compatibility issues are getting quite confusing.
Right now, if you are using Ndless 2.0 and the clickpad, I believe anything (except Ndless 1.1 stuff) will successfully work.
For the touchpad, you need it to be build with Ndless 2.0.
For the ticalc release of Ndless 1.7, you need it to be build with Ndless 1.7.
Someone please correct me if I made a mistake in the above!