So which product I need

Question

I'm a little confused with all the product naming adobe threw
at Flex and its by-products, I think I need some help :)
What I want to be able to do is to deploy Flex sites in MXML.
I dont want to pre-compile MXML to SWF in the builder, but
reference the MXML directly, so it will be compiled upon request
from the server. Is that the Flex Data Services? If so, can I use
the FDS Express if i want to host a few MXML sites (I know its for
one CPU, does it mean I can host 10 MXML enabled sites on the same
machine?).
And most important of all, it should sit on an IIS 6.0

Answer 1

I have an update from a Flex product manager:
FDS express is meant to enable deployment of low-volume,
non-mission critical applications or POCs. FDS express can support
more than 1 application per CPU, but no single application can be
deployed on more than 1 CPU. As applications become more popular,
or there is a need for a higher degree of reliability customers
will need to purchase either a Dept. or enterprise license of FDS.
In terms of sizing, FDS express can support an unlimited
number of users per application, however, applications deployed on
FDS express, can run on no more than 1 CPU. Moreover, there can be
no load balancing (hardware or software) or clustering of
applications.