[wp-hackers] how to do a single-instance widget with the new API

[Raphaël Droz]

Hi,
I've just done my first widget using the new API.
The abundance of documentation helped a lot anyway I'm now blocked by
what, at a first look, didn't seem a huge issue but ...

This widget uses jquery to request the server asynchronously.
On the server side, in my widget/plugin directory I have an action.php
which :
define('DOING_AJAX', true);
include('../../../wp-config.php');
include(WP_CONTENT_DIR . '/../wp-admin/includes/admin.php');
# then sends the answer.

The problem is that get_option('widget_wpsympa'); returns nested arrays
of the (possibly) several instances of the widget while it's aimed to be 
unique.

Should I forget about the new widget API ?
Should I wait for a WP 3 new option in $widget_ops ?
Or is there a way to obtain the specific instance calling in action.php ?

Thank you for your answers.

Raph