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varkor
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Natural ways to make a functor adjoint
If your categories are small and Cauchy-complete, a natural choice is to take the presheaf construction. (Cauchy-completeness is necessary because $F$ is only recoverable up to Cauchy completion.)
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Are there cartesian closed monads that also preserve the closed structure of the CCC
I don't have time to give a detailed answer now, but Kock's Bilinearity and Cartesian closed monads may be relevant to you.
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Category whose morphisms are commutative monoids but not enriched
@FJ: in your example(s), does composition preserve addition on one side, but not both? Or does it not preserve addition on either side?
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Why is $\rm{Cat}$ a Cartesian-closed category?
I believe this is essentially a duplicate of this question.
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Is there a faithful functor from the freely generated bicartesian closed category to $\mathbf{Set}$?
@TimCampion: a bicartesian closed category is a cartesian closed category with finite coproducts. (The corresponding notion of functor is then clear.)
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A result on symmetric closed monoidal categories
Perhaps it would be worth contacting Robin Houston? I notice another result about monoidal categories is attributed to him on the nLab page for semicartesian categories, but without a proof. Perhaps he could be persuaded to write these up.
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3-functoriality of the lax Gray tensor product
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Adjunction up to distributor
These were studied in Kan's paper Adjoint functors, as "rel. adjointness".
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