Yeah the race/planet filter would be necessary. I actually started working on it before but it's not as easy as it may sound ;). Will get there eventually though.
For the resources though, you can just search for it
and it displays all the buildings that produce this resource, as well as the storage buildings and harvesting methods.
The commenting idea would basically make it like a semi-wiki? It's not a bad idea. I'm currently implementing the ability to be logged in with your ape apps account in all Coloniae pages so it would be pretty straightforward to implement.
Oh wow this is actually a formidable idea! I would love to make that. Will stat working on it as soon as I get the chance ;). In fact, ADU has all the data for vehicles (bots) and resources, but it's missing techs. This can be easily added in an update of the game though.