hippie4lyfe saidI think action alerts can be very helpful in changing companies, holding people responsible for homophobic/transphobic actions, etc. I think many of us are on random lists, some get HRC calls to action, others might get a local organization. I wish there was a big group collective of millions of LGBT & allies emails that could send out action alerts to really make a difference.
Maybe one day I will be ambitious and make such a site lol.
As much as I applaud the sentiment, there's a reason why there are so many different organizations. Just as with any other community, the GLBT community is splintered when it comes to the organizations that it supports. Some people really dislike certain organizations, or feel that local organizations are more useful than national organizations, or feel that focusing on one section of GLBT rights (Lambda Legal versus SLDN versus PFLAG) is the way to go, etc. The broad diversity that the GLBT community encompasses probably makes this phenomenon even more prevalent.
So, while your heart is in the right place, it's unlikely that such a site would make a difference in the broad range of things. The tendency of individuals within groups to pursue different interests is working against you.