It seems that things in Egypt are steadily deteriorating, so, while I sincerely hope that things in Egypt become more stable (for the sake of the civilians there primarily and much less so for my own travel plans) Ive been considering alternatives...
And it seems that there is a reasonable one that might well be workable...
From a S-N direction, rather than heading North from Sudan into Egypt, it is possible to head East to Port Sudan, and from there catch a ferry to Jordan (on the Red Sea)... And then ride overland to Israel and thence an easy ferry to Turkey or Greece.
The only significant issue is the long running political/military "tensions" that surround Israel... The result is that getting an Israeli stamp/visa in your passport can make it difficult to travel in the neighbouring countries. However, it seems that the relevant customs authorities are willing to accomodate travelers by putting their stamps on loose papers rather than directly on the passport pages...
So, it seems that there is a viable route even if things do continue to deteriorate in Egypt... I guess Id just have to check out the pyramids at some later date then...