I run un-shortening service called http://unshort.me which is getting about 200K API requests/day.
Sample of 1,000,000 requests from the service:
bit.ly 612,170
tinyurl.com 55,091
goo.gl 41,812
ow.ly 35,531
is.gd 29,533
t.co 26,043
j.mp 21,172
other 178,648