Most scholarly information enters Open Access through one of two methods:
1) publication in an open access journal
2) deposit article (aka "self-archiving") in an institutional repository, author's website or other archival location
UNM's institutional repository is LoboVault
Open Access is by definition free access, but conducting research and communicating the results costs money. Much innovative work in the OA movement is dedicated to resolving this dilemma.
Read the SPARC report Income Models for Open Access journals for more information about the various strategies being adopted by various OA journal providers. The report breaks down the models into supply side (payments made by or on behalf of the producers of scholarly information) and demand side (payments made by or on behalf of end users).
Articles from open access journals are "born digital" documents. Usually no print copy is produced, even for archival purposes. Some OA journals utilize electronic archival programs like LOCKSS (Lots of Copies Keep Stuff Safe) to help ensure that articles are accessible even in the event of a publisher server failure.
LOCKSS works by allowing institutions that subscribe to a journal (usually libraries) to archive a copy on a specially configured server. Under a traditional for-profit publishing model enforced by license agreements that transfer intellectual property rights to the publisher, negotiating permission to use LOCKSS can be a challenge. However, open access publishers - especially those that use Creative Commons - are in an ideal position to take advantage of LOCKSS.