Great stuff! Curious if you plan on integrating some of the existing dpreview user reviews and Q&A. I have found those to be quite helpful as well. Also, the sample galleries might be too much to ask for given the storage requirements but wanted to see if this is part of future plans as well.
We're considering both, but mainly listening to the "community voice" right now :)
Linking to data on other sites (including archive.org) seems like a better way to go, than pulling everything in (as you mentioned, storage reqs become a challenge fairly quickly)