Today, after reading a while in the past days, I finally decided to flash on my Galaxy Tab 7 (P1000) a Cyanogen Mod 7 ROM. I decided for the new ROM to have a similar version as in my HD2 (Typhoon Cyanogen Mod 7), 
that comes already rooted and highly customizable and (vary important) without all the Samsung Junk installed!
I previously had a stock Gingerbread ROM (last one from Samsung official updates), installed using Kies, rooted using CF-Root (CF-Root-TAB7_XX_OXA_JQ1-v3.3-CWM3RFS.tar). The procedure was quite easy, using Odin and official Samsung USB drivers.
I used as main reference this thread on XDA, [ROM] [GSM] CM7 Gingerbread Beta 2011-10-09. Considering that I alredy had CWM installed on my ROM (from CF-Root), I saved the update zip file in my SD card and went through the usual steps I was familiar with in my HD2. But... yes, there's a but...
Something went wrong. I got some errors during the install process, related to partitions: reading here
The update zip for CWM is here http://gtab7.nexus-lab.com/cm7sgt/up...ANG-signed.zip, (GSM only, no LTN), please be sure to flash it from recovery that supports EXT4 or flash it once so it updates kernel/recovery, reboot to new recovery and flash it again. If you encounter any problems, use the Heimdall version.
I was not much worried about. I just waited, then rebooted then updated again... and... same. Same result: soft brick on my Galaxy Tab. Normal boot left it stuck on the Galaxy Tab logo.
Ok. Well, the Tab was still able to boot in Download Mode, so I had good chances to get it back to life. So I followed the instructions to full flash and repartition using Heimdall.
After some minutes, everything was working again, CM7 was running an my Galaxy Tab 7 and I finally get rid of all Samsung junkies.
There's some very small issue on this unofficial CM7 port, but it's far more usable than the original stock ROM.