I actually disagree and say Wireless is great, IF it is setup correctly !
I have used a netgear dg834g for about 5-6 years now as a router and wireless access at first, then around a year ago simply as a wireless access point.
The Netgear does infact give off a decent signal but you need to experiment a little and find the best reasonable position in the house giving the best signal. (Mine is in the attic).
Now having a good wireless broadcasting access point is no use whatsoever if your wireless adapter connected to the PC is a 15.99 usb dongle under the table. They suck.
You NEED a high power reliable broadcast AND receiption at your PC. A standard USB in the UK transmits around 30mw. I purchased the Alfa AWUS036H 500mw
See this for details
500mw Wifi Alfa Networks 802.11g High Power USB Wifi Adapter AWUS036H - USB Wifi Adaptors - The Wifi Shop - Wifi that Works!.
As you can see its transmit power is massive and it uses an external arial which you can also upgrade for next to nothing to a 12dbi for even better receiption.
Now I can guarentee my wireless connection is every bit as good as anyones hard wired ethernet out there. Rock solid 1ms Pings to the access point.
Always think of BOTH ends, not just the router. The netgears ariel can also be un-screwed and fitted with a better more powerfull ariel. This also helps with higher transmit and more sensitive receive.
The only drawback using wireless in my opinion comes when you setup a home network and want to share files with other devices. The actual throughput speed on wireless is nowhere even close to that of hardwired ethernet. Plus the actual wireless conenction on all wireless devices is Half duplex. Wireless can only transmit or recieve at any one time, unlike Full Duplex ethernet which can transmit and recieve simulataniously at 100meg (or 1000 if you have the kit)
I personaly have a home network and never really share huge files. Streaming video is fine but I have not tried streaming anything HD over wireless.
Other things to watch for are the channel you broadcast on. On 802.11g the UK has 13 Wireless channels available to broadcast on. This is true, but there are only 3 of those channels which are pure. By that I mean any channel except 1, 6 or 11 are wavelength variations and are more suseptable to bleedover / interferance from neighboring channels. So always check what your neighbors are using and pick the channel farthest away using 1, 6 or 11.
Have a read at this for more info
IEEE 802.11 - Wikipedia, the free encyclopedia
So

now I have had my lecture for the night I will stop.
Nothing can really beat the hardwired ethernet for reliability, performance and throughput. Wireless if setup and used correctly will be as good provided throughput is not an issue. After all, even the fastest broadband connection will never max out a Wireless station with even 40meg available throughput.