Craig,
I guess this is best aimed at you, but using gmail am unable to send to the list.
Below is the bounceback I'm getting.

This is an automatically generated Delivery Status Notification

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipient has been delayed:

    gumstix-users@lists.sourceforge.net

Message will be retried for 2 more day(s)

Technical details of temporary failure:
TEMP_FAILURE: SMTP Error (state 9): 451-Could not complete sender verify callout
451-Could not complete sender verify callout for <vertigok@gmail.com>.
451-The mail server(s) for the domain may be temporarily unreachable, or
451-they may be permanently unreachable from this server. In the latter case,
451-you need to change the address or create an MX record for its domain
451-if it is supposed to be generally accessible from the Internet.
451 Talk to your mail administrator for details.

  ----- Message header follows -----

Received: by 10.48.210.20 with SMTP id i20mr117041nfg;
       Fri, 29 Sep 2006 17:08:57 -0700 (PDT)
Received: by 10.49.92.17 with HTTP; Fri, 29 Sep 2006 17:08:57 -0700 (PDT)
Message-ID: <7e272c5c0609291708w1afc7562y3d89009222dc21ee@mail.gmail.com>
Date: Sat, 30 Sep 2006 10:08:57 +1000
From: "Karl von Muller" <vertigok@gmail.com>
To: "General mailing list for gumstix users." <gumstix-users@lists.sourceforge.net>
Subject: apacer compact flash card
MIME-Version: 1.0
Content-Type: multipart/alternative;
       boundary="----=_Part_18779
_30365458.1159574937177"

  ----- Message body suppressed -----