The discover of new security problems will increase with the grow of Magento and that’s absolutely normal.
But security update is a critical info and not anyone follow the blog or receive the newsletter, so it could be really useful to get the notification on the dashboard itself and in MagentoConnect.
Yoav already said this:
one of the improvements we were going to add down the road (and it might be done sooner then later) is an RSS notifier that will be present in the admin panel for urgent messages.
RSS is a really good idea, but any idea of the date and the way it will be displayed? something like others system? (I think of the IPB board display system by example with a big red notification over the first page in admin panel), the idea is to have something you cannot miss in your day by day activities.