Hahaha, prospective agent just got in touch with his direct email, just as he said he would, and a renewed expression of interest. Reassuring!
OK. I am going to go write more words.
ETA: I replied to him, and now I'm all, 'what if that pisses him off 'cos he's busy?' etc. But on the whole, it would have felt really rude not to and it was only a very short 'thank you for getting in touch and I will certainly send you the novel when it's finished' sort of reply. So that shouldn't be annoying, right? Right. *chews lip nervously*