In an informal interview earlier this week, Yahoo’s chief information officer, Lars Rabbe, said the enterprise instant messenger was shelved because Yahoo is largely a consumer company and is not structured to take on the kind of support tasks and other responsibilities that come with selling corporate software.
“Yahoo scraps enterprise messaging”

My work had some sort of deal for the Yahoo! IM. So far, nothings gotten down to my level — we just use the “consumer” IM — and it looks like nothing ever will now.

Update: here’s an article from eWeek.

Update: AOL dumped their biz-IM as well.