What does that have to do with spawning?
Actually, though it's off topic, I know what you're talking about. There's another MC-like game out there that I used to play that has 16 color-coded "portals" that work in pairs. You could place color-coded portals in your house, and others in town, in the cave you're working on, at your friend's house, etc., and just instantly teleport between places. (In fact, you could have several "portals" tied to a color code. You climb in and it would randomly show you the other exits in that color code, then you step out once you see the exit you want.)
The Good News is you could teleport around (think Stargates).
The Bad News is you really don't need any other kind of transportation. Once you have your "portals" set up you can move from home to the deepest part of a cave, to the top of the tallest mountain, to clear across the map, in seconds. Kinda makes minecarts, horses, trucks, etc. pretty pointless and pure novelty. The other Bad News is, as handy as that sounds, you can't teleport from Point A until you set up another portal at Point B. In that game, portals (by necessity) are personal and your friend couldn't set up a portal for you. Your "portal set" is different from his "portal set". Plus the item used to make a portal is very hard to obtain.
Personally, I'm not for portals. In most cases they're a hassle. And they're too "sy fi" for RW.
The last place you warped to could be your respawn and if you haven't used teleport it should used the default location from the start of the world
but I guess it should be a mod then.