The phase difference Δφ between two points for a wave propagating in direction $\hat{n}$ is given by Δφ = (2π/λ) * ($\hat{n}$ · Δ$\overrightarrow{r}$). Here, λ=1 m. The propagation direction makes 30° with the x-axis in the x-y plane, so $\hat{n}=(\cos 30°,\sin 30°,0)=(\sqrt{3}/2,1/2,0)$. The displacement vector Δ$\overrightarrow{r}$ from (0,0,0) to (1,1,1) is (1,1,1). The dot product is (√3/2)*1 + (1/2)*1 + 0*1 = (√3/2 + 1/2). Thus, Δφ = 2π * (√3/2 + 1/2) = π(√3 + 1) rad.

Final Answer: $(\sqrt{3}+1)\pi rad$