I've been up to see Bela (northern wilderness) and am ready to enter the Swamp.Things I'm stuck on, or haven't used yet, are:
* Raw meat from croc pool (take back to the microwave in upper monestary?)
* Access denied to computers in upper monestary
* Hut doors sealed tight on the roads
* Tracking device in Arnika missing an item (I keep hearing about this Hologram in Arkania, but damned if I can find it.)
* Can't get into tower in Arnika
* Can't get into to the 'chosen one' room (with a chest, behind bamboo door) in Trynton trees
* Don't know what to use on a pedestal in Trynton trees (close to the above room)
* Haven't gotten to 7th bough (have petals and myst potion, can't use however)
* No discovered use for HLL silver ball (take back to barracks in Arnika?), empty bottles, ruined flight recorder, x ray chip, green box, silver panel, lightning rod (I don't have a gadg yet)
At this point I hate backtracking so I'd appreciate any out-and-out spoilers on what I've missed.
Thanks,
- John 
Prepare Yourself for the Ultimate in Fantasy Games