I think the benefits of the DTiVo far outweigh what TiVoNet provides.

If you have DirecTV and are using a standalone TiVo, you are missing the best feature. Dual tuner TiVo is life altering. I have a Sony SAT-T60 I paid $399 for a year ago and two Philips DSR6000Rs I paid $99 for at Circuit City a couple months ago. DirecTiVos are a steal at $99.