科技回声

Was expecting full html markup with colours etc like in most IDEs. maybe add that as a optional feature? <a href="http://qbnz.com/highlighter/" rel="nofollow">http://qbnz.com/highlighter/</a> or similar library might help there.This seems like a slightly extended htmlentities(nl2br($input)) (if done in php). handy in those times you need stuff converted so it'll output the same way as what you are pasting in.

no colors?I would just prefer to wrap my code with <pre></pre> instead of using a whitespace generator which makes pain in the ass to make modifications on the code.

Great, but I'd like to see a preview of the output on that page.

Export your font-locked (colored) emacs buffer to html:<a href="http://www.emacswiki.org/emacs/Htmlize" rel="nofollow">http://www.emacswiki.org/emacs/Htmlize</a>or<a href="http://www.emacswiki.org/emacs/HtmlFontify" rel="nofollow">http://www.emacswiki.org/emacs/HtmlFontify</a>

I would recommend you to write a javascript version to render on the fly. So that you can keep your code being saved without any modification.

If you write blog posts in markdown, it's useless.

Does it just wrap your code in pre and code tags or am I missing something?

this can be done easily with a script as it simply wrap the tex with a pre tag. i don't see the need for this kind of thing. tech bloggers usually got enough knowledge for this kind of stuff.