Very sorry to hear that. I know she also sang on a number of commercial jingles and once said she liked singing jingles because with her distinctive voice, there was no way to bury her in the mix.
For what it's worth I ran her name through yes.com and came back with only two AC stations in the last week playing "Poetry Man," WLYF in Miami and WWLI in Providence. It appears some Oldies/Classic Hits, Adult Standards and even AAA outlets did give the song a "tribute spin" after the news of her death broke. It would make more sense to hear something about her death on one of those formats as opposed to AC. And to be honest, many AC stations play no '70s at all anymore, so it's not surprising that they wouldn't acknowledge Phoebe, an artist whom the average listener probably, sadly, considers a one-hit wonder.
Anyone remember when the Hawaiian girl group Na Leo did a remake of "Poetry Man" about 1999 or so? It got some AC airplay at the time - I remember it being played on what was then 95.7 W-Lite in Grand Rapids, MI. Pretty nice cover, faithful to the original.
"S&M" is by Rihanna, by the way, and I hope to God it never crosses over to AC... but if Katy Perry's "E.T." can make it... ugh.