Through July 22 (four days):

Courthouse: 333
South Knox: 263
Halls: 388
Five Points: 75
North East: 453
Downtown West: 1032
Farragut: 502
Northshore: 155

Total: 3201

Democratic Primary: 1183
Republican Primary: 2394
None declared: 162
(Includes mail-in ballots)

Source [1]

UPDATE: Early voting through first four days of 2006 County General: 4295. Does this indicate lower turnout, scandal fatigue, or what?