GameDev used to be *much* better at this on the old site, when we had 'Image Of The Day' (instead of the #screenshotsaturday twitter importer we have now).
At that time, all IOTD posts were by actual GameDev users, and carefully moderated and collated by mods/staff, to ensure high-quality, highly relevant content. The old IOTD also allowed one to comment on the posting, so a lot of lively discussion was to be had (I don't think the archive still works for IOTD posts, but you can at least see the comment counts).
Unfortunately, we lost this in the transition to the new site, and there hasn't been a lot of general interest/motivation in bringing it back.
Yes, IOTD was really great. It was community-building also.
The forum had a partially rebuilt one that was semi-WIP after the transition but, as @Mussi mentioned, it wasn't given the visibility it had on the old site.
Currently, the articles have excellent visibility, which is good, but GameDev.net usually has a difficulty in making everything visible enough that should be visible. It took me three separate series of naggings before they even put the GameDev.net donation link somewhere visible.
If they did bring back IOTD, they'd have to make the image more visible, and currently the "GDNet spotlight" does seem to be actually bringing them much-needed revenue, so I doubt they'd move that for the IOTD to take over.
This touches on something that I've been thinking about asking, albeit by a different route: what should one do when one wants general feedback?
Yeah, that is an issue. For my own game, I was going to post a "Combat" demo and a "Exploration" demo separately, to get more specific feedback.
But also, eventually, I'll want some actual playtesters to play through the entire game and give feedback (and so I can gather metrics to see where they stalled and so on), and finding playtesters like that would be hard - but would probably be easier on game playing forums. As a developer, I'd be willing to download a prototype and try it out for 15 minutes and give feedback on it, but I'm less likely to play it for five sessions totally 20 hours or more.
We could create some kind of community-run "feedback club". DeviantArt, a large online art community, has some user-ran groups that do things like constructive critique on other members' works (i.e. critique other group-members works, and other members of the group will critique yours, and etc...).
Other groups, like non-online writing groups, do things like each week (or every other week), a different member of the community gets the benefit of the entire groups' focus on their project, to give them critique. They know when their turn is coming up in advance (say, six weeks in advance), so they can make sure their material is ready for critiquing, and if they don't have anything read at that point (their projects aren't far enough along, for example), they can be moved further down the queue for when they are ready.
We could unilaterally create a community-ran Feedback club, which will benefit the community, not add any extra work to the mods (except for the occasional nagging of Gaidden ), and it'd also create value for the GameDev.net website.