<style type="text/css">
table tbody td table tbody tr td.text table {visibility:hidden;}
table tbody td table tbody tr td.text table table, table tbody td table tbody tr td.text table table tbody td.text {visibility:visible;}
</style>

This will apparently remove the link to your blogs too. So may not be desirable, though you could still post a direct link in HTML in your page and also any subscribers would still be informed when you wrote a new one.

I've not tried the above but I know this works:
<style type="text/css">
.blacktext12 { display: none; }
</style>

I don't know if there are any hidden side effects as yet but I can't find any other parts of my page using that class.