No, I'm not disappeared but I'm just come back to my home after 3 days spent on a big customer's site for tuning their ERP (database and applications).
After few min utes of "mental reconnection" to the blogosphere, I've seen that the IE Team has released a new Beta 3 for Internet Explorer, that contains also a new refresh to the user interface:
Do you think to have seen something similar? 
Yes, the new IE7 look is extremely (and I think too much) similar to Firefox. Just a bit embarassing... 