Sorry to be the bad news guy but they WILL took it off...just like the rest in fact....and that is WHAT is gonna kill them.

As for my choice....really dont know . I'm pretty much lost in the two portal.
Yahoo has a complete, clear, fast portal - a good reliable email client.
On the other hand
MSN has this browser which integrate everything....and hotmail will get just as good as Yahoo Mail....so...yup i 'm pretty much lost...