First off are the Royal Poinciana (Delonix regia). They started sprouting within 3 days after planting! I put two seeds in each pot (actually reused plastic cups) and by today 9 out of 12 have sprouted. That's a 75% germination rate in just one week. At first I thought they looked a little lanky and needed to be moved closer to the light. After a quick google image search, it turns out this is normal and there's no need to worry.
Second to sprout were the Brazilian Tree Fern (Schizolobium parahybum). I Planted five per 6" (15cm) pot which seemed like a good idea at the time. After seeing the size of the sprouts I'm wondering if that was a good idea. The seedlings are giant! I guess that's to be expected of a plant that's said to have the largest compound leaves in the world.
Finally, yesterday my first Jacaranda (Jacaranda mimosifolia) seedling began to sprout. It's not even out of the soil yet, but I had to take a photo. You can just barely see it in the top right cell. You might have to click for a bigger image. :) I just noticed all three species have compound leaves. Coincidence?
I didn't have any Tomatillo sprouts yet so I decided to dig one up and see what was happening. No signs of germination at all. I looked them up again and found out putting the seeds in a freezer for 24 hours can speed germination. They are currently sitting in the freezer, soil and all until later today. Hopefully most will sprout within another week.
I also haven't seen any sprouts from my Screw Pine seeds. I expect these ones to take longer and figure I'll see the first sprouts within two more weeks or so.