My Mum would not want one on her roof. Consequently, there is no reason why this aerial couldn't also be used with any other equipment that requires a broad bandwidth in the 2.425GHz band such as the new 802.11 wireless network cards or video transmitters. The idea behind this aerial was for anyone to be able to make their own aerial for point to point links, and do it cheaply. The criteria are cost effectiveness, ease of construction and durability. Durability is important as you don't want wind, beak cleaning magpies and highly destructive nibbling cockatoos ruining your Quake III and Unreal Tournament sessions.
Birds landing on the aerial have the effect of severely diminishing the signal, too.
The aerial was derived from information on helical antennas in the ARRL Antenna book. Any places and shops referenced are in Canberra, Australia. The endcaps must have a completely flat base. Canberra Southern Plumbing had caps with big dimples in the centre right where they would obstruct the placement of a bolt. The brass shim is available in whatever length you need from Belconnen Metal Centre.