CFW developer HABIB is releasing a new CFW under his own name as this is not a REBUG Released but a Cobra CFW (Standard CEX Based) from Habib for v4.66 FW.
All indications are that HABIB is still with the REBUG Team and a release should be coming soon by all indications.
But in the meam time and for user's who do not want the REBUG style firmware here is a choice from HABIB ..

The developer has fixed the PS2 Controller Sync issues,this is done differently depending on your PS3 Console Type (BC/Semi-BC/non-BC). Additional features and more can be seen in the release notes below from HABIB:

FEATURES:
1.MADE OUT OF 4.66 OFW
2. HAVE INSTALL PACKAGE FILES AND APP_HOME
3. HAVE REACTPSN COMPATIBILITY
4. PATCHED LV0 TO DISABLE ECDSA CHECKS
5. PATCHED LV2 TO ADD PEEK/POKE SUPPORT
6. PATCHED LV1 TO DISABLE LV2 PROTECTION
7. PATCHED LV1 TO ADD PEEK/ POKE SUPPORT
8. IT CAN RUN GAMES SIGNED WITH KEYS UP TO 4.66
9. CAN BE UPDATED OVER ANY CFW.
10. CAN BE UPDATED OVER 3.55 OFW
11. NOT ADDED NO BT/BD PATCHES
12. RSOD BYPASS
13. REACTPSN OFFLINE PATCH ADDED
14. BETTER SYSTEM STABILITY
15. REMOVED CINAVIA DRM FOR HDD CONTENT
16. REMOVED CINAVIA FOR BDMV
17. REMOVED CINAVIA FOR BDVD
18. QA FLAG ENABLED BY DEFAULT IF PS3 WAS QA ON 3.55
19. COBRA 7.03 ADDED
20. INCREASED COBRA GAMES COMPATIBILITY
21. SPECIAL PAYLOAD FOR COBRA TOGGLE IN LV2
22. ADDED NEW ODE PATCHES BY DEANK
Built with hand rather than mfw builder used by darkjiros

PS2 FOR BC AND SEMI-BC:
Proper 4.66 emu with no bug like previous cobra firmwares

PS2 FOR NON-BC:
Iso wireless sync supported, mount iso with multiman and run it through ps2 classic placeholder(redirection).if file /dev_hdd0/classic_ps2 present then redirection will be disabled and classics will run.

NEW LV2 PAYLOAD:
Improves non-cobra mode to full extent and improves apps support

CINAVIA:
100% patched unlike current cfw released for 4.66

Download:  LINK 1
MD5: 7D4992390AC4433E8AF48D8FF6CB7CD6