Hi,
We've recently deployed Windows 7 64 bits in our school labs using MDT and on our image we've defined stuff in our "Default user" profile to those things are imported to any new accounts that logs on the computers.
We're also using DeepFreeze to ensure that computers will be stable...
accounts
active directory
configuration
customizations
deepfreeze
deployment
frozen state
login time
mdt
network shares
optimization
printers
profile management
schoollabs
software
technical support
tweaks
user profile
windows 7