The kit includes a swiveling cradle, suction cup windshield mount with ball joint, car charger, and removable accessory plate for use with the company's Innocase II Surface case, extended battery, and extended battery case. The cradle is not compatible with the Innocase Active or rugged case, and of course Seidio makes no promises of compatibility with other case brands.
The Seidio Car Kit is about $10 cheaper than the official HTC car dock and has two mini USB ports (labeled PWR and DC/OUT) to charge the EVO and another device with the use of an optional adapter.
Anyone interested?
[Seidio Innotraveler Car Kit] Thanks, AdamW!