Hello Geek,
I didn't see your msg until today and hope I can be of some help to you. I'm not a physician, but I have been a pumper for ~9 years and have had DM for ~35.
When I starated pumping, the only insulins available were "Regular" insulin and the main difference, as you know, is "how quickly" the insulin starts working, when it peaks and how long it lasts. Regular normally kicks in later than Novolog or Humalog will.