There was an old BYO article with Summer beer recipes from commercial breweries. One was from Firestone Walker, that called for pitching saison yeast and recommended a bit of light/medium toast oak soaked in chardonnay.
Sounded pretty good to me.
Also, Jolly Pumpkin's Bam Biere is aged on oak, but with wild yeast. The tiny hint of vanilla rounds out the spicy/tart flavor from the yeast/bacteria.