A quick note, since it has been pretty silent here: we are working to get Yepp released in Debian ;)
First an introduction:
I joined the yepp devel a couple of months ago. The code is mostly written by Park (and he did a very good job), I restructured a couple of things and converted the sources to use the GNU Autotools.
The latest version (which i named 0.0.4-1) are now in CVS (need to do some configuring though).
Use the module yepp_sources (since full_sources was a bit confusing, I am removing them again)
You can get CUI version at http://www.madingley.org/james/nope.
Yepp Explorer for Linux is GUI version of it.
Protocol of Samsung Yepp(www.yepp.co.kr) E-Series, Z-Series and Digitalway(www.digitalway.co.kr) EX-MP is same.
Tested with Yepp YP-E32S.