Sounds more like the huorins (sp?) thoses ents that are becoming trees or trees becoming ents. Also, they could be some of the black hearted ents/trees that Fangorn talks about
First off, it's huorns. And I'm not entirely sure that Old Man Willow is a huorn. I wouldn't be entirely surprised to find out that the Willow is some sort of Maia gone wild. Likewise I think Bombadil is probably a Maia, if he's anything that we know about.
A neat thing is how Bombadil speak in rhyme, even when it's not written out as poetry. Read it aloud and you'll see what I mean.
Our little Hobbits aren't as resourceful as we think, are they? All right, so getting eaten by giant trees is hardly something they would expect, but Frodo and Sam lose their heads rather quickly. Overtaxed, are there wings over in Took's Corner yet?
Oh, and odd spoiler thing I thought about - notice how Merry and Pippin, the ones who are taken prisoner by the evil tree, are the ones who get to meet Ents? It's an interesting symmetry or irony or something.
Hair, great job re-posting. Let's get to the next page quick, though.