Eventhough latest IM product is VoIP enabled the quality is not always the best. To compensate this they made another quick move and:

Barely a month after launching its own VoIP enabled IM beta product, the company snapped up DialPad, a VoIP company that sells PC2PC and PC2Phone services to consumers. “What we saw in DialPad was quick way to add PC2Phone and inbound calls,” says Joanna Stevens, Yahoo’s VP of Corporate Communications. Yahoo will integrate Dialpad’s services with its new IM product.

Source

Advancedippipeline asks themselves:

How long until Microsoft and Google react?

I don’t say anything about Microsoft because they have MSN Messenger. But Google…ahem. Err with what to react? With a Hello?