HTC Touch Pro2 (htc-rhodium)
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The HTC Touch Pro2 has different codenames for different carriers (Barium for AT&T). Rhodium seems to be the original codename for the carrier-neutral version.
Android seems to be working on the device, so there is at least a downstream kernel working: https://www.youtube.com/watch?v=fa1Eu_hzX8Q
A tutorial can be found here: https://www.plecoforums.com/threads/xdandroid-dual-boot-android-on-htc-touch-pro-diamond-hd.2742/