For what it's worth:
I see about 120 mph for a skydiver's terminal velocity (in the standard flat position with arms/legs out, compared to a Point Break style chase at about 300mph).
This article measuring spiders came up with a max of about 1.7 mph (78 cm/s)
Ballooning: Data from Spiders in Freefall Indicate the Importance of Posture
http://www.americanarachnology.org/J...A_v20_p107.pdf