The Palm.com Store is now offering the Treo 680 smartphone for FREE after a $50 mail-in rebate. This limited time offer includes free shipping and is only valid when purchased with a new line of service. The offer runs though September 16th.

In addition, Palm’s online store is also offering the Palm GPS Navigator Car Kit for FREE after mail-in rebate with the purchase of select new Treo smartphones with new service activation. The GPS kit is regularly a $219 value. This promo includes the Treo 700p, 700wx, 755p and 750 and runs through September 1st.