For bloggers who have enabled a mobile template for their blog, the overall site design is handled by Blogger: you can add gadgets to your mobile template easily enough, and if they're in the sidebard then Blogger decides where to show them instead.
But the design inside posts is our own responsibility. I've been pondering this for one of my blogs that definitiely needs a mobile-template view, but which has a number of side-by-side images.
I'm not certain yet, sure, but the article's suggestion to add this CSS rule to my template
img {
max-width: 100%;
}
might just be a very good one for me to apply.