It takes years of observation & intuition to thoroughly understand how planets affect us, so we aren't going to uncover the implications of recent planetary discoveries in a hurry, are we? There is some astrological info on Sedna here (the link on this page to a previous article is interesting too) and here.
This one has insights into several of the more recently discovered 'watery' planets.
You might like to read an astrological explanation about part of what is heading our way here. It concerns the Cardinal Grand Cross that has been forming in the heavens from 2008 til mid 2010. For me, it confirms much of what I thought without the benefit of in depth astrological knowledge.