Ok, here are my updated times as of August 10, 2009
Luigi Circuit- 1:11.443
Moo Moo Meadows- 1:21.793
Mushroom Gorge- 1:53.556
Toad's Factory- 1:59.830
Mario Circuit- 1:25.687
Coconut Mall- 2:03.740
DK Summit- 2:06.314
Wario's Gold Mine- 2.00.020
Daisy Circuit- 1:36.076
Koopa Cape- 2:30.759
Maple Treeway- 2:27.120
Grumble Volcano- 00:54.384 (used the massive SC, don't know if this counts)
Dry Dry Ruins- 2:06.602
Moonview Highway- 1:51.562
Bowser's Castle- 2:35.916
Rainbow Road- 2:38.510
GCN Peach Beach- 1:19.269
DS Yoshi Falls- 1:03.573
SNES Ghost Valley 2- 56.768
N64 Mario Raceway- 1:47.882
N64 Sherbet Land- 2:14.694
GBA Shy Shy Beach- 1:29.693
DS Delfino Square- 2:11.309
GCN Waluigi Stadium- 2:06.619
Desert Hills- 1:45.296
GBA Bowser Castle 3- 2:27.865
N64 DK's Jungle Parkway- 2:21.772
GCN Mario Circuit- 1:41.925
SNES Mario Circuit 3- 1:22.190
DS Peach Gardens- 2:07.427
GCN DK Mountain – 2:30.436
N64 Bowsers's Castle- 2:44.419