CNET: Experts downplay 'spim' threat
Analysts doubt that spim - spam through instant messaging - will ever arise to the level of cost and annoyance as spam. Especially now that the big three of AOL, Yahoo and MSN have closed off their "buddy lists" to third party databases, spamming IM'ers will prove easier to control. Yahoo also updated its IM client to make it harder to deliver unwanted messages. Just last summer, AOL added similar features into AOL 9.0.