This is what I found on ASUS website:
CPU LGA775 socket for Intel® Pentium 4/Celeron CPU
Support Intel Pentium® Processor Extreme Edition & Intel Pentium® D Processor
Support Intel next generation 65nm CPU
Compatible with Intel® 05B/ 05A and 04B/04A processors
Intel® Hyper-Threading Technology ready
The Support Intel next generation 65nm CPU might mean Conroe and might not. I'm guessing you have a 50% chance that it will. I tried to find if the board has VRM 11 which is essential to support Conroe processors.