Rewriting custom post types ?

Hi, i’m trying to build my own classified ads plugin.
But i’m stuck with the rewriting rules.

1) First; are they fully finished in the beta or will it evolve ?
e.g. there is no “home” actually for the custom post type.
/wordpress/classifieds-ads brings a 404.

2) Will there be rules added automatically for custom taxonomies or have I to create them myself ?

I have 3 custom taxonomies;
yclad_action (eg. classifieds/type/OFFERS or classifieds/type/PROPOSALS)
yclad_tags (used like post tags)
yclad_category (used like post categories)

3) Is it possible to build new rules on “top” of existing rules or have I to create them all from scratches ?

Well, what I would like is to have rewriting just as post does.

So for example; I would like to be able to have urls like

/classified-ads/type/offers (where “offers” is a yclad_action)
/classified-ads/type/proposals/category/cars (where “proposals” is an yclad_action and “cat-1” is a yclad_category)
/classified-ads/type/proposals/category/cars/tag/red (where “red” is a yclad_tag)

and combine them with regular rules (author,time args,etc.).

Eg for a complex one :

/classified-ads/2009/12/type/proposals/category/cars/tag/red

would load
-that custom post type
-from december 2009
-where the yclad_action is “proposals”
-in the yclad_category “cars”
-with the yclad_tag “red”.

I’ve used a plugin called “AskApache RewriteRules Viewer” that lists the rules that WP seems to create automatically for custom post types.
Currently, It shows

Array
(
    [extra_rules_top] => Array
(
    [classified-ads/[^/]+/attachment/([^/]+)/?$] => index.php?attachment=$matches[1]
    [classified-ads/[^/]+/attachment/([^/]+)/trackback/?$] => index.php?attachment=$matches[1]&tb=1
    [classified-ads/[^/]+/attachment/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$] => index.php?attachment=$matches[1]&feed=$matches[2]
    [classified-ads/[^/]+/attachment/([^/]+)/(feed|rdf|rss|rss2|atom)/?$] => index.php?attachment=$matches[1]&feed=$matches[2]
    [classified-ads/[^/]+/attachment/([^/]+)/comment-page-([0-9]{1,})/?$] => index.php?attachment=$matches[1]&cpage=$matches[2]
    [classified-ads/([^/]+)/trackback/?$] => index.php?yclad=$matches[1]&tb=1
    [classified-ads/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$] => index.php?yclad=$matches[1]&feed=$matches[2]
    [classified-ads/([^/]+)/(feed|rdf|rss|rss2|atom)/?$] => index.php?yclad=$matches[1]&feed=$matches[2]
    [classified-ads/([^/]+)/page/?([0-9]{1,})/?$] => index.php?yclad=$matches[1]&paged=$matches[2]
    [classified-ads/([^/]+)(/[0-9]+)?/?$] => index.php?yclad=$matches[1]&page=$matches[2]
    [classified-ads/[^/]+/([^/]+)/?$] => index.php?attachment=$matches[1]
    [classified-ads/[^/]+/([^/]+)/trackback/?$] => index.php?attachment=$matches[1]&tb=1
    [classified-ads/[^/]+/([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$] => index.php?attachment=$matches[1]&feed=$matches[2]
    [classified-ads/[^/]+/([^/]+)/(feed|rdf|rss|rss2|atom)/?$] => index.php?attachment=$matches[1]&feed=$matches[2]
    [classified-ads/[^/]+/([^/]+)/comment-page-([0-9]{1,})/?$] => index.php?attachment=$matches[1]&cpage=$matches[2]
)

But for example, I guess

[classified-ads/([^/]+)/page/?([0-9]{1,})/?$] => index.php?yclad=$matches[1]&paged=$matches[2]

is used to use pagination (eg. classifieds-ads/page/2), but currently it does not work. (404 not found)
Also, is this regex, what does ([^/]+) means ?

Thanks A LOT.