So the biggest thing that's still missing in in the acpi suspend/resume code is CardBus (and to a lesser extent PCMCIA) support. My CardBus laptop died two years ago, so I don't really have something to hack on, and makes this work.
If somebody in the EU has an old ACPI laptop with CardBus (preferably two slots) that they're willing to donate to the project, please contact me off-list (kettenis@). Thanks, Mark