Just don't get too excited based on emails or comments from some low level tech. or an over-excited fanboi.
Understand this: There is NO OFFICIAL ANNOUNCEMENT FROM SAMSUNG. They have made official announcements about it for the Galaxy S, but NOT the Spica.
There are even doubts that the ARM processor in the Spica is sufficient for Flash, which is a key selling point in 2.2.
If they do decide to put out an upgrade to the Spica, good, but as I said, until they either SAY they are going to do it through an official channel, or actually do it, I am not holding my breath.
I suggest you don't get too excited yet.
Frankly, if they do upgrade it, I'll install it quick enough to sell this legacy phone and move onto something else.
I think Samsung's customer support is a pile of f***ing sh*t.