I addressed your Vimeo question and will let you or someone else cover the quotation marks questions (since I didn't understand that part of your question.)
PressThis uses Javascript to capture the information about the Vimeo video. In order to modify it you need to hook WordPress in one of the few places you can hook it in PressThis and insert your own Javascript code, and I chose to hook the "admin_print_footer_scripts" action.
In the Javascript code generated by the hook I set a timer and continued to check the #embed-code textarea every 100 milliseconds until it had a non-null value, and then I disabled the timer (I might have been able to do it without a time but I couldn't figure it out.)
One I had a valid value to operate on I used a regular expressions to extract the clip ID. I coded it so that you can select multiple videos and it will copy all of them (assuming that PressThis even supports it.) The looping on i+=2 allows the code to grab the clip_id for the tag and ignore the tag. The height and width are hardcoded; you can easily change them in the code if you like.
That's about it. Here's the code to copy into your WordPress theme's function file, or use it to create a plugin (you can also find the code here: http://gist.github.com/478078):
add_action('admin_print_footer_scripts','greatjakes_admin_print_footer_scripts');
function greatjakes_admin_print_footer_scripts() {
if ($_SERVER['PHP_SELF']=='/wp-admin/press-this.php') {
$script=<<<SCRIPT
<script type="text/javascript">
var intervalId;
var embedCode;
function monitorEmbedCode() {
embedCode = jQuery("#embed-code").val();
if (embedCode!=null) {
window.clearInterval(intervalId);
var matches = embedCode.match(/clip_id=([0-9]+)&/g);
var output = '';
var clipId = 0;
for (var i=0; i<matches.length; i+=2 ) {
clipId = parseInt(matches[i].replace(/(.+=)([0-9]+)(&)/,'$2'));
output += '[vimeo clip_id="' + clipId + '" width="400" height="225"]\\n';
}
jQuery("#embed-code").val(output);
}
}
intervalId = window.setInterval(monitorEmbedCode,100);
</script>
SCRIPT;
echo $script;
}
}
Hope this helps.
BuddyPress.org is up, viable, and appears fresh. Version 1.2.6 was released just last month.
So, I'd say no, Automattic hasn't ditched BuddyPress.
Best Answer
You can use a free account at http://box.net or Ubuntu One to upload and share .zip files, but unless you have a LOT of code that you want to share, you're probably better off embedding your code samples into your posts.
Wordpress now supports posting source code on blogs hosted through their site: