You can always count on the Android ROM development community to extend a device's relevance in the tech world. Take the OG Galaxy Tab for example - this little guy was the first Android tablet to hit the scene (running a phone-specific version of the OS, no less). It has been around for about a year and a half now, and there's no hope that it will ever officially be updated to anything past Gingerbread.
However, thanks to the CM team, OG Tab owners (both the GSM and CDMA variants) can now enjoy the first taste of Ice Cream Sandwich on their old-school seven-incher by flashing the new nightly builds.
It could oftentimes be unstable and not properly tested, lacking any changelogs, but eventually evolving into alphas, betas, release candidates, and finally stable releases.
Considering the new CM build servers are almost ready to start pumping out CM9 builds every nine minutes, we should be seeing these, along with nightlies for all other supported devices, on a regular basis.
GSM Galaxy Tab - P1000, SGH-T849 (T-Mobile), SGH-I987 (AT&T).