Welcome to the land of groovy corner tables that
allow text to flow around 'table-like' elements.
One caveat with the IFRAME tag is that it forces a page's
content to pulled from more than one 'source' file. That's
fine if frames are used for context completely unrelated to
the main body content. However, it an article want to have
little asides, but all content managed from a single file, then
IFRAME tag forces the source file to be broken into multiple
source files. Not a biggy, but it can lead to run away files
that are not clearly related to other content files which
is a bit of a content managment headache. Wouldn't it have been
cool, if the 'copy' between the <IFRAME> and </IFRAME>
tags was rendered inside the floating frame cell. Then a single
file could be used for the main content body and all 'side bar'