Just an FYI .. but JavaHMO works for TiVo2Go transfers ... You might try talking with those folks ... I believe you have taken a different angle on how you respond to HMO Server discoveries which is why you wouldn't be compatible with the newer software ... Just a thought.
I'm rather looking forward to a TiVo Server upgrade in MC11 to work with T2G! Of course, you would want to make certain that you are backwards compatible with those individuals that aren't upgraded yet or won't upgrade (who knows). So a little CheckBox for T2G compatibility might be something you should consider ?
UPDATE: Just an FYI. I got someone from the TiVo forums to point their T2G TiVo at my MC11 PC and the Audio browsed, but he wasnt seeing the correct structure .. it was browsing my GENRE list ? "Warning: Bad URL argument(container) Details=Basic" kept showing up in the log window. He could play songs though ... here's that error "Bad Request: Unknown Command /TiVoConnectCommand=QueryItem&Url=/TiVoConnect/161268"
When he went to look at the Photos section I got an "ABNORMAL PROGRAM TERMINATION" from MC11
So, it's POSSIBLE to play to music ... but the structure is broken. Photos -- Forget about it!