Chin Wong talked about the Open Source Bill in his column this week. For as long as the bill will not go against freedom of choice and technology neutrality, I think it will be cool.
Advocacy can also be done by educating as many users as possible on how to use and avail of support for these applications, rather than imposing.
Looking into our archives, I found that last September 2002, the group Open Minds was launched. One of its goal is "to lobby for the adoption of a pro-open source software policy in the Philippine government."