How many Kenyans [looking at Nairobi alone] know about Skype,,, or know about it and know how to use it ???
How many Kenyans [looking at upcountry] have access to a computer,, then have access to internet anytime they want ??
I believe for africa, the threat of skype and related is still in the final frontier for telcos.
[thats just my 2 cent opinion]