I couldn't find a summary of this in the forums, so for those interested, i gathered this information from personal experience and in-flight magazines. Feel free to update or add missing info.

Beijing
Distance to Town: 23 KM
Bus: 45-90 min. (CNY 16)
Airport Express (T2/T3 only): 15-30 min. (CNY 25)
Taxi: 30-90 min. (CNY 70-150)

Chengdu
Distance to Town: 15 KM
Bus: 30 min. (CNY 5)
Taxi: 30 min. (CNY 60)

Chongqing
Distance to Town: 21 KM
Bus (Airport Shuttle): 40-50 min. (CNY 15)
Taxi (from central peninsula): 30-60 min. (CNY 60-70)

Dalian
Distance to Town: 13 KM
Taxi: 30 min. (CNY 30)

Guangzhou
Distance to Town: 28 KM
Subway (Line 3): 60-90 min. (CNY 6)
Bus: 60-90 min. (CNY 13-32)
Airport Express (shuttle bus): 45-55 min. (CNY 12-13)
Taxi: 40-50 min. (CNY 100-120)

Guilin
Distance to Town: 28 KM
Bus (Airport Shuttle): 30 min. (CNY 20)
Taxi: 30 min. (CNY 80)

Distance to Yangshuo: 95 KM
Taxi: 90 min. (CNY 300 + 30 expressway toll)
Bus (Airport Shuttle + Taxi to Bus Station + Public Bus): 120 min. (CNY 46)

Hangzhou
Distance to Town: 27 KM
Bus: 45-60 min. (CNY 20)
Taxi: 30-40 min. (CNY 70-100)

Jinan
Distance to Town: 33 KM
Bus: 60 min. (CNY 20)
Taxi: 30-40 min. (CNY 80-100)

Lijiang
Distance to Town: 25 KM
Taxi: 30 min. (CNY 80-100)

Nanjing
Distance to Town: 35 KM
Bus: 45-60 min. (CNY 20)
Taxi: 30 min. (CNY 100-130)

Qingdao
Distance to Town: 32 KM
Bus: 60 min. (CNY 15)
Taxi: 45-60 min. (CNY 80-100)

Shanghai (Pudong)
Distance to Town: 45 KM
Bus: 50-90 min. (CNY 16-30)
Airport Express (Maglev): 8 min. (CNY 40-50)
Subway: 60 min. (CNY 9)
Taxi: 50 min. (CNY 150)

Shanghai (Hongqiao)
Distance to Town: 15 KM
Bus: 30 min. (CNY 4)
Subway: 20 min. (CNY 4)
Taxi: 25-40 min. (CNY 50-90)

Shenyang
Distance to Town: 25 KM
Bus: 45-60 min. (CNY 15)
Taxi: 30 min. (CNY 70-100)

Shenzhen
Distance to Town: 32 KM
Bus: 30-45 min. (CNY 10-30)
Subway: 50-70 min. (CNY 5-9)
Taxi: 25-40 min. (CNY 80-100)

Tianjin
Distance to Town: 20 KM
Bus: 30-40 min. (CNY 10)
Taxi: 30-40 min. (CNY 50-70)

Wenzhou
Distance to Town: 26 KM
Bus: 60 min. (CNY 5)
Bus (Airport Shuttle): 30 min. (CNY 20)
Taxi: 30 min. (CNY 80-100)

Xiamen
Distance to Town: 10 KM
Bus: 45 min. (CNY 6)
Taxi: 30 min. (CNY 40-50)

Yinchuan
Distance to Town: 25 KM
Taxi: 30 min. (CNY 40-60)