Currently we have a few "widgets" / settings available that allow administrators to customize the homepage. An example would be "Show bestsellers on homepage" which allows the admin to specify how many items (best selling products) they want to showcase on the home page. I am wondering if something for auctions would also be handy. I think offering the same flexibility with "auction items" would be great.
Without having experimented much with the current auction system and only surface reading the documentation, it seems that auctioned items are basically just regularly displayed items that you don't actually know are auction items until you click "Buy" or whatever. So filtering based on auction items in categories, or even easily finding auction items is not something currently incorporated.
I suppose most people who want to auction items, also want to highlight the fact that they have certain items up for auction. i.e. maybe a timer displaying a countdown of the auction, a BID action button, maybe the current BID amount, maybe a display of the latest bid from which user (Guest if hidden), perhaps a small icon in the top right of the thumbnail "AUCTION", a little auction hammer, a monkey eating pickeled beats, whatever.
The goal would be to draw people into the fact that these particular items are up for auction.
Not sure if you prefer this to be a plugin or something you want to natively offer. Just thought I'd throw the idea out there.