OpenSLP release 0.7.0 contains significant code changes from the original is based on the original Caldera Systems source code snapshot from April. Additional features (such as DA support in the library and configuration enhancements have been added, but most of the changes to the code were made to tighty things up in order to (hopefully) make OpenSLP easier to port and maintain.
The OpenSLP library is nearly complete (about 90%) which means that for a few exceptions, it will change very little in the next major releases (0.8.x, 0.9.x and 1.0.x). The OpenSLP daemon, on the other hand is only about 60% complete. Look for major feature enhancement to slpd in the future.
Get the latest version of OpenSLP from http://www.openslp.org/download.html