Has WordPress ditched BuddyPress

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.

The Import HTML Pages plugin might help you. If you haven't installed WordPress yet, you might want to start with WordPress 2.9.2 (the current maximum version tested with the plugin) and then update to 3.0.1 once you've completed the import.

Potentially the plugin could have problems with HTML that isn't well-formed, but you can use HTML Tidy and/or the W3C Validator service to help check and clean up your pages before you import them.