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Anatoly_Vorobey comments on Estimating the kolmogorov complexity of the known laws of physics? - Less Wrong
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The standard model is over here, see page 36: http://arxiv.org/pdf/hep-th/0610241v1.pdf
You don't have any atoms in the initial state - nor anything that can reasonably be called matter. My (very ignorant) guess is that we won't even know what it takes to specify the initial state before we have a unified GR+QFT theory.
If one wishes to describe oneself in a particular universe, then, assuming MWI, fixing the universe is peanuts, complexity-wise, compared to fixing the appropriate Everett branch. The number of bits there is just astounding, it would seem to me.
Uh, wow, that's a somewhat large equation. It has like 500 terms. Seems... inconsistent with physicists seeing beauty in physics.
You can see it in just five lines here, page 1. And an even more compact formulation would just list the symmetry groups, the various fields and how they transform under each group, and would then stipulate that the Lagrangian contains every possible renormalizable term (which is a principle in the construction of such theories, since renormalizable terms that aren't included get generated anyway).