Well, Conroe looks pretty good, and I'm glad Intel are becoming more energy-efficient, but Cool'n'Quiet-enabled Athlon 64's and Sempron 64's will still be more so, imo.
Of course, the forthcoming socket-M2 AMD CPU's have higer TDP's, so maybe Intel won't fair so bad.
Still, the VIA C7-M 785 has a TDP of 15W, yet should handle everything but heavy multi-tasking and gaming fine. Plus, the security features are real sexy.
The C7 desktop line are exactly the same, I believe, but with an 800MHz Bus.