Unfortunately, I don't think it will be of any use to actual poets... Rhyming isn't really in style for modern poetry, and what there is is usually more subtle internal rhymes rather than heavy end-rhymes.
Still, this is a ton of fun to write doggrel with.
(source: my wife has an MFA in poetry)
Greek and Latin poetry is actually almost never end-rhymed... because Greek and Latin are heavily inflected with lots of conjugations and declensions, the "endings" of words are often the same and a bit too obvious.
Rhyming poetry actually came into style for a couple centuries in English poetry... it's by no means a universal feature of poetry.
Edit: Also, I guarantee that "finding a rhyme" is not the bottleneck that's keeping modern poets from writing rhyming poetry.
That said, this has prompted some very interesting discussion of what kinds of tools /would/ be useful.