Today, Sprint announced the availability of the ES400S, a rough, rugged, Windows Mobile 6.5 smartphone from Motorola. The availability of the handset marks the first time that a branded and stocked Motorola enterprise device has been sold through a wireless carrier. Certified for MIL-STD 810G, a 4-foot drop, and IP42 sealing specifications, the ES400S will be available at the end of October to qualifying business customers for $499.99. The ES400S sports a biometric fingerprint reader, VoIP capabilities, Wi-Fi a/b/g, GPS, 3-inch touchscreen display, EV-DO Rev. A, HSPA/GSM for travel, and 256 MB RAM. This thing looks like it could take a licking and keep on ticking, no?