Hey, just so you know ... this post is now about 15 years and 8 months old. Please keep that in mind as it very well may contain broken links and/or outdated information.

My Series3 box upgraded to the new 9.4 software release yesterday. The Summer 2008 Service Update is for Series3 and TiVo HD DVRs only and includes the following new features:

• the ability to play (or delete) an entire folder at once (which is helpful if you want to queue up a bunch of SpongeBob for the kids)
• the on-screen Guide is now available even when you’re watching a recording (before, if you pressed Guide while watching a recording it would dump you out to Live TV)
• you can jump forward and back 24 hours in the Guide by using the Instant Replay and Skip-to-Tick buttons on the remote
• there’s now a “search by callsign” option in the Guide as well (if, for some reason, you can remember your FOX affiliate’s callsign, but not the channel number, I guess)
• one-click closed captioning toggle from the channel banner (my personal favorite new feature!)
• your Thumbs Ratings can now be refined via a separate screen under TiVo Suggestions

This update also added a new application to stream YouTube videos to television through the TiVo. It’s been known for a while that the decoder in the S3 and THD boxes supported H.264, but this is the first time (to my knowledge) that functionality has been used. Work is already underway in the community to reverse engineer this so that H.264 video can be sent directly back to the TiVo without the need to transcode it into MPEG-2 first.

The discussion thread about 9.4 on TCF is here, and the pyTivo folks are talking about the H.264 stuff here.