Do you mean org.richafces.taglib package?
inplaceSelect introduced in RichFaces 3.2.0. JBDS contains RichFaces 3.1.2 in capabilities and RichFaces 3.0.1 in included JBoss Seam 1.2. So it rather not included then removed.
Could you explain in detail what kind of problem do you have?
I also have problems with inplaceSelect.
The problem is the following:
When I try to use <rich:inplaceSelect> in my page, I have an error saying that the tag is not defined.
I am using Seam 2.0.3.CR1