It looks to me as if the div#flash_container is the exact size of the flash object, thus it will be in the same position regardless of text-align. With your current setup you could try something like...
The marquee tag is a non-standard HTML tag and won't validate under any doctype. That's why it's recommended JavaScript be used for marquee instead of the non-standard tag.
Not really, I've done something like this on one of the themes I created but I couldn't get the jQuery to work on your site. You'd be best off posting this request in the JavaScript section.
Ctrl + F 'text-16' in your coding, it must be a part of your coding and not generated through the script otherwise it would not be visible in the page source, but in Firebug. If you can't find it,...
There's an example, first table has a cellspacing of 10, second table has a border-spacing of 10. If it doesn't work for you, may I see a link or some code? Also, knowing...
Remove the line-break after those two entries, I believe you don't actually need any of them; removing them made no changes for me except making the first two properly inline.