For a few months, I did not have time to enhance dynamics. I'm currently building up some exciting projects and this leaves me a very few time to invest in "just-for-fun" stuff.
Additionaly, the excellent assetic library (included in Symfony2 standard distribution) does a very similar job (still I'm not sure it knows anything about dependencies), but in a much more powerfull way. There is plenty of gadgets and fancy stuff all around, and I'm sure you'll enjoy it.
So hereby I decided to make official the end of my involvement in sfDynamicsPlugin.
The documentation website will stay up, but don't expect anything to come out. Of course I cleaned up some blog articles about the dynamics releases, because they became completely useless.
R.I.P.
I got some e-mail and real life comments, so I'd like to clarify some points.