I was reading a blog posted earlier this month entitled "Touching Your Audience" and it reminded me of a very similar and successful tactic we used at KBIG with the legendary Charlie Tuna using the "store" feature.  

As you know, we suggest using the store for small items that easily can be replenished such as T-shirts, key chains and client coupons.  However, another fun way to use it that gets your team involved and also markets the station is to offer custom outgoing voicemail greetings voiced by your well known personalities.  You'll find that your members will love the custom greeting and many will not change it for years, if ever.   Not to mention, everyone who calls them will hear a message about your product.