Milovana.com

In my teases so far, I've only used pics I've found in places I've seen specifically mentioned in other threads as being okay. However, I'm surprised I haven't seen any mention of these popular sites anywhere.

http://www.ampland.com/mmpage
http://www.hoes.com/
http://www.link-o-rama.com/greenguy/mlinks.htm

Are images linked from these sites acceptable?

From what I can see, those sites just link to other porn sites. In fact it was pretty hard to find any pic sets on any of them... (?)
But from the looks of it, they are just linking to free promo pics and vids, which would usually be fine to use I think.

If the pics are provided for free and for promotional use, then usually you can use them in a tease.