Not really a resource for Construct... but cool none-the-less.
If you want to make some homebrew games for the DS, this may be what you are looking for. I've had a quick play with it, and it seems really cool. I'm a bit of an avid DS fanboy, so I will probably mess around with this more later.
Check it out! It's free!
http://www.dsgamemaker.com/
~Sol