Trunk is where all of the continuing work will get checked in first, and as time goes by it will generally be considered more risky than using a branched release. The branch directory will eventually hold more as time goes by. Each published release will be exported from there, and it does make things a bit easier to do patch files to compare each release. Branches will generally not have things patched against them and generally won't have commits done either, with the exception of any bugs discovered by the brave between now and Jan 1
All in all, I think having it set up this way will make it easier not only on us, but on you guys as well because there will be a baseline to go by for creating patches to submit things for the codebase.