After some debate, I have posted it. It is a little tricky for us in these situations, because posting it as a sticky message might confuse some members into thinking we are involved and/or endorsing this conference. As we are not, and in remaining true to our unbiased charter, we have to be careful with our actions.
However, I think it is important for people to be aware of such activities, particularly for a treatment like LDN that has an avid user's community. With the appropriate disclaimers I see no issue here and I have gone ahead and posted it.
Thanks for your understanding; I hope you will reflect positively upon us in the Yahoo LDN group when opportunities arise.