I have sent mails to many bus-fans all over the world. It helped me identify a lot of them, sometimes they don't just care and do not reply or reply very short.
Look at the make CASA and MESA...that person was very helpful...

http://www.imcdb.org/vehicle_47071-Casa-Delfin.html
http://www.imcdb.org/vehicle_47072-Masa-S-500.html

Also some Italian buses I have found that way.
It's very nice to find people who now a lot about buses and most of the time they are very helpful.

It is said above, SteveA can identify lots of them (well, rather UK & other European busses actually...)

The only buses I know are 1980s MCI coaches. Dowe have any bus experts, at all, on ICMDb?

well I understood it so, that he does not know the buses, not that he is not interested in helping us...

SteveA is our usual UK bus expert.
For the various European buses/coaches,
I had asked for help from an expert on the www. last month ...but he's not interested.!
here is his reply:-

Sehr geehrter Herr Steven,
herzlichen Dank für die Übermittlung der Fahrzeugfotos. Leider können wir Ihnen hier nicht weiterhelfen, da uns die Fahrzeuge nicht bekannt sind.

Wir wünschen Ihnen weiterhin viel Erfolg und verbleiben

Mit freundlichen Grüßen

Dr.-Ing. E.h. Konrad Auwärter
Tradition, Innovation, Beratung (TIB)

Friedrichstraße 2
94431 Pilsting
Tel.: 09953 / 980034
Handy : 0171 / 3879200
www.konrad-auwaerter.de

i'm pretty good at the North American ones, but not too good identifing ones from other ares of the world

I've already added a few comments to the ones i can identify

Link for unidentified busses:

http://www.imcdb.org/vehicles.php?resultsStyle=asImages&makeMatch=2&make=unknown- &modelMatch=1&model=&class81=81&class82=82&class83=83&class84=84&class86=86

I've noticed that there are at least 50 buses still unidentified. Maybe we should ask help from bus enthusiasts. For example here is a good website for bus spotting.

http://busexplorer.com/PHP/mainpage.php

PS. I already mailed to them. Let's hope they can help