This isn't groundbreaking, but you can now use emojis in Blogger. About a week or two ago a new icon appeared in the "compose" mode in Blogger. That icon represents the special characters that you can insert into your Blogger blog posts. Those special characters include emojis. They also include more practical things like arrows, math symbols, and special characters needed for properly writing a variety of languages.
You can search for special characters by name, by drawing a symbol, or you can just browse through the galleries.