There were some plans to resettle the Icelandic population in Alaska after a volcanic eruption in the 1870s. Not sure if that's too late for you.A very, very WIP map of Kitchen Sink TL. Basically a kitchen sink of all the somewhat obscure early-mid 19th century PODs I like experimenting with, mashed into one TL. Africa will certainly look very different by the end, and there will be a Big Mexico (TM) in the west.
btw, if you have an interesting POD you like experimenting with, please mention it. I might want to add it in, and I'll credit you for the idea.
There's also the Antilles Confederation.