Dropbox handles TrueCrypt containers very nicely. When I update the TrueCrypt container then dismount it, Dropbox syncs only the modifications. Just what I wanted :)
SkyDrive on the other hand, when I update the TrueCrypt container then dismount it, SkyDrive knows that the container has changed as the little indicator starting moving, but nothing actually gets synced to my SkyDrive. :(
I did read on a different forum about changing a preference in TrueCrypt's to not preserve the modification timestamp of the file container. When I did this, then updated a container and dismounted it, SkyDrive noticed the modification, but synced the whole blasted container! Not just the modifications like Dropbox did :(
Am I doing something incorrect or is there a setting within SkyDrive to make it act like Dropbox? It would be really nice to use SkyDrive as I have 25GB of space on SkyDrive compared to 2GB on Dropbox...