"Venusian Cuisine" , at Strange Horizons
I have the haiku for Element 69 "Thulium" on the Periodic Table of Haiku.
And for a slight fee you can download from Alexandria Digital Literature any of the following six poems:
"Sisyphus on Science"
"Checklist"
"It's All Time-Machines, She Said" (Took 3rd place for the 1997 Rhysling Award)
"Is It...?"
"Rose Today"
"Family"