the main contribution i've made around here is posting my little hack on the WysiwygWiki page.
that's very interesting. one annoyance is html-specific: your browsing is then confined to this dinky little text window widget, whose height must be fixed in advance, thus making it really hard to be a reasonable size for different browser setups. But yes, I agree that's defintely the best way to do it. -- BrendanOConnor