Current releases can be found on sourceforge.
Also on sourceforge you can get the latest development version from the Git repository. To install this most up to date version use the following procedure:
mbse@hobo:~$ tar xfvj mbsebbs-****.tar.bz2 mbse@hobo:~$ cd mbsebbs mbse@hobo:~/mbsebbs$ make clean mbse@hobo:~/mbsebbs$ ./configure mbse@hobo:~/mbsebbs$ make mbse@hobo:~/mbsebbs$ su Password: root@hobo:/opt/mbse/mbsebbs# make install root@hobo:/opt/mbse/mbsebbs# exit exit mbse@hobo:~/mbsebbs$