I don't know about a repo for aircrack-ng, only aircrack-ptw (which is implicit from the web page referred by the link in the OP: http://www.mulliner.org/nokia770/repository bora free), for aircrack-ng there's a link to a .deb in e.g. that blog you posted:
http://www.komputika.net/maemo/index...1mad_armel.deb