1) Start carrying Audio-Technica headphones (I recall there was a thread where Jamey mentioned this once)
2) Make the site more visually appealing or experienced-based - e.g., maybe category tabs (amplification, cables, headphones, accessories, special buys). Also add in a gifting feature to allow head-fiers to surprise others with gift-wraps of small gifts - like
or
3) Add gift cards/bonus bucks and tie it head-fi.org using using paypal. Check it out you could have a "Give gift to another head-fier" under the "Quick Links" section of head-fi.org. The give gifts would allow a head-fier to add to another head-fiers Headroom's account and Headroom would send a nice note or allow the give giver to add a special note. "XXX - for your wonderful advice and always answering my PMs. Here's $5 (or $10 or $1, etc) added to your Headroom account. Click
www.headphone.com/myaccount to redeem."
It may sound complicated but it is very easy to implement given head-fi.org's large membership, paypal and a little customer database on your end. The benefit would be a cross-promotion to build Headroom brand awareness and Head-fi.org as an even nicer community. Also since the gift giving is on a Headroom account when a head-fier redeems their card they are buying products from Headroom.
3) Do you have an e-newsletter that is sent out regularly with new products, promotions?