We have seen the extremely alpha build of CyanogenMod 9 for the now defunct HP TouchPad in January this year, and here is additional news on the progress of the situation. It seems that nightly builds of CyanogenMod 9 Alpha are now available, and you will be able to take advantage of these nightly builds by synchronizing it with the main development branch of CM9 across all devices, making sure that the TouchPad version will always be on the receiving end of the latest updates. Of course, just because there is a new build each night, this does not mean you need to install it each night. Most of the time, the changes are not earth shattering, but rather, in small increments that you might not even notice.
Teamwin are the brains behind this exercise, where they have come up with a Twitter account that will alert the world with new download links each time there is a spanking new build released. Of course, if you prefer to look for the information yourself, then you can always check out the latest builds at a download page.