Update: for this article.
First of all, if you have a wireless setup in your home and have WEP security or have no security, please change it to WPA-PSK or best WPA2. There should be at least an option for the WPA-PSK if not WPA2 in your wireless router. The technical terms may look daunting but basically from the users perspective it’s just selecting setting WPA-PSK/WPA2 instead of WEP but behind the schene your wireless data is much secure. Also do change the default admin password of your router.
Now to wirelessly connect your TiVo/SlingBox/Xbox 360/PS3 (20GB) to Internet just buy a wireless bridge instead of buying individual adapter. Wireless brige has ethernet port/ports which you will use to connect you TiVo/SlingBox/Xbox 360/PS3 (20GB) and bridge itself will connect it to your wireless connection like wireless adapter. You know just to connect TiVo it will cost $37.41 using TiVo Wireless G USB Network Adapter for Series2 DVR (AG0100) or it will cost $88.99 to connect your Xbox 360 using Xbox 360 Wireless Network Adapter. The wireless bridge I am recommending is cheaper, better and would able to connect 1-4 devices using your ethernet connection. I use ZyXEL P-330W which can be used as a router/bridge and it supports WPA2, highest available security for wireless connection. You can connect upto 4 devices wirelessly with this device. Also you have to do the setup only once instead of buying multiple adapter and setting up each device. Setup is very simple and similar to standalone adapter setup. Now why I am recommending this device while you can buy other available wireless bridges like Linksys. Other bridges are expensive and even some require hacks and ZyXEL P-330W which I use already and is on sell. It’s selling for $12.99 or $2.99 if you use Google Checkout as a new customer. In fact it’s way cheaper than I paid for the device originally.
Don’t misled by it’s title, you can use ZyXEL P-33 as a router or a bridge.
If you don’t have wireless setup in your home or your router doesn’t support WPA-PSK/WPA2 security buy two of these. One use as a router and connect it to your DSL/Cable Modem, and other one use as a wireless bridge and hook up you TiVo/SlingBox/Xbox 360/PS3 (20GB) etc.