TuxOnIce has a long feature list, including the ability to cancel hibernating or resuming by pressing Escape, image compression to save time and space, a versatile plugin architecture, support for machines with Highmem, preemption and SMP.
The TuxOnIce website (this one) and mailing lists provide support for dealing with issues.
The primary author of TuxOnIce is Nigel Cunningham. A huge thanks must also go to Bernard Blackham, Florent Chabaud, Pavel Machek, Gabor Kuti and Michael Frank along with many others who have tested and contributed to the development of TuxOnIce.
You can get the source packages for the TuxOnIce kernel patch and tarballs for the userui and hibernate script from the downloads page.
Git trees can be found on GitHub.
It has been a long time since the last update to this website, but the ball hasn't been dropped on TuxOnIce. The Github repository has been being updated with new branches and work is still being done on incremental images.
It's been several months since the last update; time for another one.
Progress on TuxOnIce 4 has been very slow. Nigel has been busy with a number of other committments and hasn't had the time or energy to work on TuxOnIce. So then, although the new development is still on the table, it's not being actively worked on at the moment.
The current version continues to be maintained and patches for the most recent vanilla kernels are available from the Downloads page.