Thanks for all the suggestions about how to embed sound in a picture. I'll try a couple of them tomorrow. About half of you suggested Flash. I'm not sure how that helps. I don't want to make an animatic and then have to upload that to youtube or something and then link back to my blog. Too many steps for me and for the reader.
I just want separate pictures that scroll exactly like they do now, except that I want you to be able to click them and hear the sound-without going to another page and interrupting the flow of the story.
Like a talking comic strip that you read (listen to) at your own pace.
Something simple and fast to do. I'm gonna try Sean's suggestion first.