Galen Strawson has delivered what looks like a very interesting paper on Nietzsche's Metaphysics at the recent Nietzsche on Mind and Nature conference. Here is an abstract of his presentation:
"Consider ten claims.
 There is no persisting and unitary self.
 There is no fundamental (real) distinction between objects on the one hand and their properties on the other.
 There is no fundamental (real) distinction between the base/categorical properties of things and the dispositional/power properties of things.
 There is no fundamental (real) distinction between objects or substances on the one hand and processes and events on the other.
 There is no fundamental (real) distinction between causes and effects.
 It is incorrect to say that objects are ‘governed’ by laws of nature.
 There is no free will.
 Determinism is true.
 Reality is one.
 The fundamental stuff of reality is suffused with—if it does not consist of—mentality in some form.
I’ll argue that Nietzsche’s mature position certainly includes -, and also , properly understood, and probably or very probably  and . I take it that  and  are clearly true, in the sense in which Nietzsche intends them, and I’ll argue that - are also true, and that - are also probably or very probably true. I take the claim that - are either certainly true or probably true to be powerful support for the view that Nietzsche held them."
There is a short review of Strawson's presentation on this blog.
Here are some previous posts of mine relating to panexperientialism and the work of Strawson or Nietzsche which might be of interest (most recent post listed first):
Nietzsche's naturalism - considers Brian Leiter's criticisms of a metaphysical interpretation of the Will to Power.
Property Dualism - micro, macro and mystery : discusses whether, if experience is taken to be a fundamental natural property, this fundamentality is best explained at the level of human consciousness or at the level of nature's most basic physical constituents.
The Will to Power, life and parsimony: considers whether Nietzsche unnecessarily invokes a ’vitalistic’ principle into biology which undermines his doctrine of the Will to Power and renders it unparsimonious.
Strawson reviews: reviews of Strawson's Consciousness and its Place in Nature.
Implausibility and Irrelevance - considers Nagasawa’s metaphysical argument against Strawson that panexperientialism is implausible or is irrelevant to the problem of consciousness.
Experience and the subject - discusses Strawson's views on experience, the subject of the experience and the content of the experience.
Bridging the gap: critique of an argument against Strawson that even in a best-case scenario―in which the phenomenal properties of the ultimates are known in complete detail―panpsychism still wouldn’t help us with the mind/body problem.
From fundamentality to ubiquity: Considers whether, if it is true that experience cannot emerge (in the sense described by Strawson) from the non-experiential, then it follows from this that some ultimates must be experiential.
Strawson on physicalism and panspychism - abstract of Strawson's argument for panpsychism.
Update Feb 2010:
Video and podcast of Strawson's talk is available here. Well worth a listen, though not much on proposition 10 (re panexperientialism) and I found it heavy going at times.
I quite liked the reference at 1:25 to "the most plausible, though difficult, view of the nature of reality ... the really hard nosed monist view, which is the Spinozian, Hegelian, Russellian, Eddingtonian and Whiteheadian view that reality is suffused with, even if it doesn't consist of, mentality in some form or sense".