Vista - Virtualizing large data for ListView/ListBox

ListView has VirtualizingStackPanel inside. As far as I understand it
is there to improve performance in situations when a large number of
items (already loaded) is bound/added to the control. But what if I'd
like to bind a large set of data to a ListView without actually
reading the data at once? Let's say, I can read 1000 records per
second, but my list has 100 000 rows. How to display the list without
waiting 100 sec for it to pre-load?
Maybe I just can't find where to start and this is a well known
topic... Can anybody provide a reference?