Links to Powermeter sites:

• SRM (direct power measurement from spider)
• Saris – makers of Powertap (direct power measurement from hub)
• Polar (power inferred from chain)
• iBike on the fly power calculations inferred from air resistance, gradient, etc.
• Quarq (direct power measurement from spider)
• Brim Brothers (soon to be released)
• Metrigear – makers of Vector (direct power measurement in Speedplay pedal axle – planned release 2010)
• Garmin power meter computer
• Specialized power meter computer

Links to books on training with power:

• Training and Racing with a Power Meter, by Hunter Allen and Andrew Coggan (watch for second edition early 2010)

Links to websites applying analysis to cycling:

• 2Peak
• Analytic Cycling

Lists dealing with power meter based cycling:

• Wattage Email Group (google membership required)
• WKO+ Email Group
• Cycling Forums (includes a power based training forum)
• Analytic Cycling

Useful resources on training with power:

• Article on Power Meters (pdf viewer required)