9049C wasn't seen at all in PM peak, suspect replaced by 9103D
because it entered service late.
Today, 2/10/07,
Tuesday
30: 9012H (SL SP)
30: 9016Y (SL SP)
30: 9073G (SL 197)
98: 9061R (SL SP)
154: 9080K (SL 30)
199: 3845K (SL 240)
199: 3881E (SL SP)
243G: 340U (SL SP)
243W: 101T (SL 243G)
335: 390A (SL SP)
79: 3738L (SL SP)
182: 376S (SL SP)
182: 7201S (SL 252), weekday DD!
192: 7209X (SL SP)
246: 7216A (SL SP)
249: 9255Z (SL 199)
251: 7210R (SL SP)
252: 7267C (SL SP)
252: 9020J (SL 30), NAC cameo
257: 7199R (SL SP)
179 cameos (evening):
PM cameos for 9031C, 9049C, 9064H, 9291T (MIA 22 days). All other
17 buses were in service. Means there were 22 buses on 179 today!
Unlikely to be breakdown replacement bus since
they were driven by different BCs.
179: 3730H (SL 335)
179: 7200U (SL SP)
179: 9069U (SL SP)
179: 9094X (SL SP), bus later broke down... 
242: 9103D (SL 97), entered svc late, skipping 1st round
242 cameos:
242: 9100L (SL SP), 9126M cameo
9100L was taken off svc in afternoon, leaving no bus
255 cameos:
255: 7211M (SL SP), 7208Z cameo, which was cameoing for another 255
bus