Here's a quote from my resize post:
http://www.linode.com/forums/viewtopic.php?t=246
Quote:
This will resize a disk image of ANY type (including RAW, swap, ext2, ext3), but it will only "expand" the filesystem if it's labled as ext2 or ext3 in the Members section.
It will work on swaps, but you have to "swapoff -a; mkswap /dev/ubdb; swapon -a"... Or, just delete the swap image and re-make it, either way.
If you delete the swap image and re-create it, don't forget to add it back to your configuration profile.
I would have made the platform manager do the mkswap for you, but I decided against it because technically someone might have re-formatted this partition to contain data, and I generally don't like deleting things (as opposed to resize2fs erroring out on a non-ext2 fs, mkswap would just blow it away).
-Chris