Yes, excellent thread idea, Scott. We could ask
@dave what happened to the thread title. I do think "Untitled" won't attract too much attention to this important topic.
My favorite invasive to talk about is Melaleuca, aka locally "punk tree". This is the tree that the Army Corps introduced on purpose into the Everglades back in the 1930's with the intention of helping to "drain the swamp". Now, thankfully we know that's not a good idea, but still we're stuck with millions of these terribly invasive trees. They bloom 2 or 3 times per year and are the source of very allergenic pollen, then of course also make a billion seeds as well, which the birds happily spread around.
Thankfully, there is a company making mulch out of Melaleuca - the Florimulch company. The tree makes excellent mulch because it is the source of tea tree oil, so the wood is aromatic and resists insect invasions. UF did a study some years ago and found that termites avoid melaleuca mulch because of the aromatic oils in it. Please, if you are mulching your yard, make an effort to use this excellent mulch that also helps eliminate an invasive tree. It's available at good nurseries, as well as at some Lowe's stores.