Lucy Lawless' yelp in disbelief in the swimming scene was for real, since Renée O'Connor unexpectedly pinched her.
Sappho was ancient Greece's best lyric poet (her poems were to be intoned to the accompaniment of a lyre). Sappho of the isle Lesbos has, since ancient times, been suspected of being homosexual, thus giving us the words 'sapphic' and 'lesbian'. Very little of her lyric poetry survives, the only complete poem extant being "An Ode to Aphrodite".
At 10:12 Gabrielle's and Xena's (or their body doubles') bare buttocks appear once again.
The bar fight includes the classic slide-a-villain-the-length-of-the-bar scene.