I have been playing with HME applications recently and hopefully the NZ TiVo have this support in them . But seems HME hasn't been updated for a long time but they still support it it seems but hardly any applictions written.
I haven't contacted them as of yet for any official application support but I'll look into it late on. Its a shame I dont' have a TiVo yet to try it on and will have to wait until they are released to try the apps on a real TiV0.
If anyone has a real TiVo they can contact me to try the HME applications I have running.