Hi MoT,
it s interesting that the ice routes on Kilimanjaro are among the most difficult in the world; Reinhold Messner and Konrad Renzler climbed The Icicle on the Breach Wall for the first time in 1978, but I don't know if it has been repeated or not.
Not much info about the actual route is to be found, but here is s short description of the direct route:
Ascend the rocks and couloirs to the Baletto icefield, climb the left of the two icicles to the diamand glacier.
I have attached a picture taken from Barranco camp with an enlargement of the breach wall Although the glaciers have diminished enourmously in the past 24 years, you can still see the 2 ice pillars on the wall.
(And yeah, that's me, enjoying the tea

)
Best thing to do would be to buy Messners book "free spirit" which has a chapter about it:
http://www.amazon.com/exec/obidos/ASIN/0898865735/the7summitscom/Hope this helps,
best regards,
Harry,
7summits.com
ps: the picture was taken in 1998
pps: the route is graded VI...