Okay, some clarification and some more info.
Cat5 UTP cable has a maximum transmission distance (whether 10BaseT or 100BaseT) of 100m (328 ft.) without a repeater. A segment is defined as the distance from a hub or switch to the NIC. While you probably can stretch the distance, your transmission speed will certainly be degraded. If you go with a wired solution, I would bury it (probably is some sort of conduit to add to its longevity).
Wireless is certainly an option but transmission speedis dependent on open-air distance and other variables (number of walls, compositon of walls, etc.). The maximum speed of the wireless protocol (802.11b) is 11 Mbps.
Here are some distances and related transmission speeds from the Linksys site for their Wireless solution:
Indoor: up to 50m (164 ft.) @11 Mbps
up to 80m (262 ft.) @5.5 Mbps
up to 120m (393 ft.) @2 Mbps
up to 150m (492 ft.) @1 Mbps
Outdoor: up to 250m (820 ft.) @11 Mbps
up to 350m (1148 ft.) @5.5 Mbps
up to 400m (1312 ft.) @2 Mbps
up to 500m (1640 ft.) @1 Mbps
Obviously, if you go with a wireless solution, you will be transmitting both over a combination of indoor and outdoor, so your mileage will vary from thesefigures.
