I'm also intending to submit some work, as writing in the W40K Universe (for money) would just be awesome beyond description.
I am however, a bit confused in that they are asking for a summary
instead of a synopsis
for Novel submissions.
Summary != Synopsis
And I'm sure if they wanted a synopsis, they would have said so. After working so hard on writing a decent synopsis, I'm a little at a loss as to what to include as a decent summary.