I did the same thing as many people out there after I rooted my 8.9. I downloaded CWM from the market and installed the "10.1" version of CWM Recovery. As soon as it tried to reboot into recovery, the screen flashed an restarted. Thankfully, I found this forum with the vanilla CWM Recovery image and flashed with Odin3 and all is well again. I didn't lose any data and now I am able to boot into CWM Recovery to backup my ROM so I can remove all of the bloatware without concern.
If you have the same problem, download Odin3 v1.85 and the vanilla CWM Recovery file at the top of this thread. Boot into download on your 8.9 and open Odin3. Check "PDA" and click the button. Select the file you downloaded and click start. If it doesn't work, you likely did something else other than simply install the CWM Recovery app from the market.
Does anyone know if the Bonsai ROM for the 10.1 works on the 8.9? I know Samsung has specific ROMS for both, but I wanted to see if anyone else has tried it before I do it.
EDIT 10.23.11 - Forget Bonsai for now. No luck flashing the ROM. The install runs perfectly, but I get the same issue as the old CWM Recovery version when it tries to boot. I am going to dig apart the package and see if there is anything I can do to port these 10.1 ROMS over without having to build them from the 8.9 ROM. Now with CWM Recovery working, this makes it easy to bring back my factory image