Too late, I moved on
Color me a defector. I love my EVO, but I have been waiting for an HDMI dock for too long, so I moved on.
First, the phone was out of stock. Then there was no HDMI cable, even third party one. Got the cable, tried the HDMI out - software limited to gallery slideshow and stock video app, graphics chip quite weak, 720p almost unwatchable. Then I couldn't wait for an official FroYo update any longer and moved to CyanogenMod, which still lacks HDMI support (supposedly coming soon). Then I put the Palm Touchstone coil inside a soft TPU case, wired it to the trimmed, cut-down-to-size, superpuper short MicroUSB plug, which is constantly plugged into the phone. Charging on a Touchstone, syncing via WiFi and Astro.
So, here I am, with HDMI unsupported ROM, always-on phone case and covered USB port. Please, give this HDMI dock to someone else, someone who still wants it.