Find out what model(s) of laptop will be used on ISS. Confirm reports on OS target(s) planned.
Find out what custom programs are needed in addition to those we know about.
Find out what nonportable commercial programs are used, and identify alternatives.
Establish relationships with responsible people at the agencies.
GET THE SOURCE CODE!
Post a "signup sheet" for ongoing projects: who's on what, what's unclaimed.
Post a schedule, including launch dates and deadlines for software completion to allow use on each mission.
Post an advocacy page: what benefits astronauts & the space agencies can expect from GNU/Linux; statements by influential individuals.
Find sponsors, identify mutual benefits. (We get expenses--i.e., shipping-- paid, they get what?) Find grants to pay for members' porting time on bigger projects.
Set up a CVS server to manage project documents.
Find volunteers to take leadership roles, choose a governing board.
Make and display a project logo. :-)