Well damn good.... it is a damn good idea!
See, the most important thing u will need is volunteers... The resources can be collected later on and i think, PG would be the best place to start with. You can start with naming a commnity and asking the PG members of ur city to join in (in this reagrd, orkut is also a gud idea!)
Once u have that, u can state ur plans and ideas, of what u intend to do. Lets others pitch in their ideas as well... U can ask them to collect old clothes, and other stuff... or it can be like a community work, wherein u go to houses and tell the people of ur need and asking them to donate.
u can orgainse small stalls in ur locality and tell ppl about ur plan and ask them to join in. There would be many enthusiasts who would love to pitch in. Let me tell u, the more u take it in ur hands, the better it would be... forget about local authorities... Self help, is the best help..
Let me know, how u liked my ideas... Can pitch in some more if u need.