It's not hard, just a little irritating. You can do it through mobile VN you just have to know a little HTML code.
Here:
Take Picture
Upload picture to file sharing site (Flickr, photobucket, I used smugmug)
COPY the hosted picture URL.
Reply with the URL inbetween these two boxes "[IMG]" (typed of course and w/o quotes)
That's it. Peace of cake.