MacroQuest64

Hmm. Sure I can spit out about 6 different varations of this idea, but...

First of all, is it possible to have a macro that would work through multiple zones (basically that would continue to work before and after you zone).

If so:

I think it'd be great if you could goto a point (in a zone), type something like:

/macro favspot "Named to be used as your favorite spot"

Example:

/macro favspot BBLDoN

Marking you currently location at the Wayfarer's Camp in BB.

The point of this macro, if possible, would be if you were at somepoint, you could type in the macro, and off you would go to your FavSpot.

I'm sure there would be many possible problems (like trees, mobs, and just collecting all the info on zone-to-zone routes), but thought I'd ask.

The only problem would be zone-to-zone travel mapping. Ever hear of the Delivery Route Problem? How to map an entire city so a door-to-door delivery/sales man can travel through the entire map, hit every house, and have it the shortest possible route.
Not saying you'd need to worry about short routes but I played with a point-to-point traveling macro once and with just the Odus zones, no PoK. About three hours into just mapping the zones and writing a logic to handle 'if I'm here then I need to go there' I screamed and gave up.

Collisions, lag, zoning, people, mobs, and anything else you can think of are easy to deal with.

If you have some time on your hands this is the best way to start.
http://macroquest2.com/phpBB2/viewtopic.php?t=5086
ml2517 did a wonderful job with this. If you had the maps the only thing left would be 'if I'm here, move to here so I can follow this map to there'

Yes it's doable, and not overly complicated either. Further, you could create a way-point recording system to have it navigate from a zone's pre-recorded waypoints to existing favorite locations.

Check out advpath in snipettes, Wrap a small macro arround the inc and you've got what your looking for.