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My feelings is that its tripped out the spam detectors.
Regarding the PFI, i would be a little concerned about throwing money in to get included, when there may be another problem.
Why not try the base index page via PFI to see if there are any probs, give 48 hours+, then check the domain if its there then you know your good, if its not then it maybe worth contacting ask jeeves for a Q and A session about why its not included.