I'll start!
Here's a pic of my TiVo, now installed neatly into cabinet.
My setup is pretty modest, Sony Bravia KDL40V4000, MacBook 13 inch, Core Duo 2 GHz, 2 GB RAM. External 500 GB USB hard drive for media storage and Time Machine backup. TiVo and TiVo wireless do-dad.
And that's it!
TiVo does the video recording, MacBook does the torrents, VLC for playing movies. Works really well for 720p content, tho MacBook fan spins up to high speed after a minute or two.
I'm pretty pleased with the rear of cabinet also, nice and neat to keep little fingers from fiddling with cables.
Only connections to TV are TiVo (HDMI) and MacBook (HDMI and minijack audio).
Finally bought some of that black spiral cable tidy system, and it has worked well.
Now only one remote required, and one bluetooth Mighty Mouse.

Perhaps there is a market for a pedantic geek to come and re-cable your lounge, nice and neatly.

Cheers,
Joseph