Hi all!
We're currently in Nairobi, Kenya (Jungle Junction) and just completed one year of Africa. We started in Morocco arrived in Cape Town after 9 months and now we're on our way to Europe, Romania on East Coast. We crossed the following countries: Morocco, Mauritania, Mali, Burkina, Togo, Benin, Nigeria, Cameroon, Congo Brazzaville, Congo Kinshasa, Zambia (yes... we crossed from Kinshasa to Lubumbashi), Namibia, SAR (+ Lesotho), Botswana, Zambia, Mozambique, Tanzania, Kenya without a carnet. Each country issued some sort of Temporary Import Permit so it's possible to do it with out it. In Mauritania and Tanzania the customs officer stamped also my passport. All the process was hassle free and pretty easy.
Morocco - Tanger Med - free, just registered at customs
Mauritania - 10E when entered and asked and payed 10E at exit but just because was the first weeks in Africa. In reality you don't need to pay twice
Mali - Gogui - 10000CFA Laissez Passer (normaly 5000CFA but we arrived on Sunday) + 5000CFA police registration of the LP
Burkina Faso - Koro - 5000CFA LP
Togo - Senkanse - 5000CFA LP
Benin - ?? Near Aneho - 5000CFA LP
Nigeria - Seme - 7000 Naira at Seme Border (1000 bribe to stamp passports, 4000 TIP, 2000 Bribes in order not to pay a bond); apparently at Nikki the TIP is free; payed 1000 Naira to extend the TIP for a second month at Mfum
Cameroon - Ekok - 7500CFA 15 days Laissez Passer (no one checked that it had long expired when we exited)
Gabon - Bitam - 10000CFA LP after hours fee (normally 5000CFA until 6 PM)
Congo - ?? Doussala - 10000CFA LP(asked 20000 but negotiated to 10000 - probably possible for 5000)
DR Congo - entered through a small border near Luozi and managed to pay nothing; exited through Kasumbalesa and managed not to go to Customs (very big border post); is not recommended to do so as you can have to haggle to exit (it happened to us in Benin)
Zambia - Kasumbalesa - TIP Free, Road Tax 50000 Kwacha (can avoid paying it)
Namibia - Katima Mullilo - No TIP, just road Tax 140 Nam$
SAR - Vioolsdrif - nothing just waived through
Lesotho - Sani Pass - There's 30 Rand bike tax but we've payed 100 Rand for visas, tax and everything
Bothswana - Grobler's Bridge - 240 Pula (Auch) Permit, Road Tax and Insurance (no papers just a receipt) other reports suggest that this practice is random
Zambia - Kazungula - TIP Free, Road Tax 50000 Kwacha (can avoid paying it, second time we didn't pay)
Mozambique - Cassacatiza - 27 Meticals TIP

yeah that's almost 1US$
Tanzania - Unity Bridge - 25 USD TIP
Kenya - Taveta - 20 USD TIP
Also in Nairobi we've just applied successfully for the Ethiopian Visa (20 US$ pp) after asking the ambassador and kindly explaining our story.
Will report our experience with the following countries.
Cheers,
Ionut