According to this post on the SDA Asia site today, Andi Gutmans is quoted as saying that Yahoo is doing their share in helping PHP6 come along that much faster.

Yahoo is Helping Zend with PHP 6, says Andi Gutmans co-founder and vice president of technology at Israeli-based company Zend Technologies, in an interview with Stephen Shankland of c|net news. PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

They mention what PHP6 will be and include a link to the (oldish) meeting notes concerning it. Be sure to check out the comments for some interesting questions...