The elections results are still delayed, and there is now talk of a presidential runoff. My guess is that the margin was too large for Zanu-PF to make Mugabe the winner, so they are angling for a 2nd round of vote fraud, possibly at a time when foreign attention is elsewhere.
We have reports that the leaders of MDC were in hiding. If the Zimbabwe state security apparatus wants to move, it would have be before the final vote total.
On the brighter side, it appears that thare are negociations between Zanu-PF and the MDC, which implies that there might be a peaceful transition, though I think that Mugabe will be the wild card in all this.