Here is an 80-photo trip:

http://crawfurd.dk/slideshows/kilimanjaro/index.html

Here is the content of an email from Tusker regarding the best times to climb having the best weather.  It appears we have a choice, better weather but more people, or less people and some chance of worse weather.

From Tusker.com:  We climb year-round, but Jun-Sep and Dec-Feb are the usual dry seasons in Tanzania, so busier times.  Late May, early Oct, and early Mar are nice because  you find few others in the park and you stand pretty good chances of mostly clear weather.   You’ll find our climbing dates and prices here:  http://tusker.com/tuskerTrips_KilimanjaroClimb_DatesAndPrices.cfm