Preferably via a mailing list, which you can subscribe by sending empty e-mail with subject "subscribe lms-en" to address ecartis@lists.rulez.pl. Further emails should be sent to address lms-en@lists.rulez.pl.
In order to effectively report bugs or new ideas, it's recommended to subscribe mailing list, where you can get quickest response for your problems from either LMS users or developers team. There's also Bug Tracking System available, when you can report bugs upon registration. Reports from BTS are also forwarded to mailing list, so the best practice is to subscribe to list, report via BTS and send link to mailing list and finally wait as your report will evolve. BTS address is bts.rulez.pl.
Newest version of LMS can be downloaded from CVS repository utilizing WWW interface at cvs.rulez.pl, or with CVS tools (anonymous access, empty password):
cvs -d :pserver:cvs@cvs.rulez.pl:/home/cvsroot login cvs -d :pserver:cvs@cvs.rulez.pl:/home/cvsroot co lms cvs -d :pserver:cvs@cvs.rulez.pl:/home/cvsroot logout
Informations about changes and version history of LMS is included in Changelog.