PS3 will be around 30 million consoles sold worldwide by June 2009.

[PS360ForTheWin]

PS3 has sold roughly 3.5m consoles this year so far (using vgchartz data), so thats 5 months at roughly 700k per month, assuming this continues throughout 2008, with boosts and holiday sales it should sell 12+m in 2008 total, so end of 2008 ltd sales will be at least 20m.