Originally Posted by Seattlesun
I'm not sure if you're talking about a wired or wireless network, but I don't have one (trying to avoid going that route, but I may have to).
Since you already have a cable modem, why not go for a network?
Routers are cheap...you can often get them on sale for as little as $20 new. Or search eBay and you can get them for similar prices.
Today's routers are very easy to set up. Once you plug everything in, from your computer's internet browser you type in the router's default IP address to access the router's settings. Often it's printed on a label somewhere on the router itself, if not it should be in the instructions.
Cable modem is the easiest to set up as it usually doesn't require a log-in. Even if it does like with DSL/PPPoE, you store those settings in the router's firmware.
As far as wired vs. wireless, wired is definitely the easiest. Most wireless routers will have wired ports as well, usually 3-4, so don't limit your search for just wired routers. Using wired is almost always a Plug and Play affair, if you have a Series 2 Dual Tuner there is already an ethernet jack on the back. If yours is a single tuner model, all you'll need is a USB to ethernet adapter. Not all adapters will work with TiVo, check the TiVo website or this forum for recommended models.
If running ethernet cable between the router and TiVo is not practical, you will need to set up a wireless network. The Series 2 can use a greater variety of USB wireless adapters than the later models, but if you want to use the more secure WPA encryption, you will need to use the official TiVo Wireless Adapter. Or, as someone else already pointed out, use a Powerline adapter. These plug into your wall outlets and use your house wiring like a really big ethernet network.