SafeCom 125Mbps WirelessLan 802.11g card - £19.45 or less delivered from Ebuyer.com
Go through Quidco for 1.5% cashback (~20p).
The SWLCT-54125 (Chipset TI TNETW1130GVF) is an IEEE802.11g compliant wireless CardBus PC Card. It provides superior performance and interoperability within a mixed mode network (802.11b and 802.11g). The SWLCT-54125 is backwards compliant with all 802.11b and 802.11b+ wireless equipment, making it a seamless integrator for the most popular wireless networks. Plus, this all-new CardBus provides a high transfer rate up to 54Mbps for todays high-speed broadband connections.
Features: Supports PC Card hot-SWAP and true Plug & Play; Works with all existing network infrastructure; Backward compatible with 802.11b; Capable of up to 256-Bit WEP Encryption; Freedom to roam while staying connected; 22-Mbps Packet Binary Convolution Coding (PBCC)(according to the IEEE Std 802.11b high-rate specification); Up to 125 Mbps data transfer rate in Turbo mode of operation; Rich diagnostic LED indicators with Integrated Antenna; Supports Window 98SE/2000/ME/XP; Low power consumption; Easy to install and configure