hmm 805D Is relativly cheap and overclock well, but any AMD A64 cpu [especialy the X2 series] would beat it even with just a slight overclock becaues it does less work per cycle, while the AMDs does more work per cycle so they can beat it even on lower clock speed =).
Thats just to highlight some stuff.
Also, NO, The conroe won't fit in any motherboard, they have to be specifically designed for conroe..... ITS TOTALY DIFFRENT THAN THE PENTIUM D SOCKET 775 [LGA T] CPUS!!!!
Last of all, if you have to get a conroe, wait a month.. or two [or abit more, god knows when they'll be avalible in stocks and the good mobos for reasonable price range will be out], and if you can't wait.. get a decent AM2 rig with either x2 3800 cpu or single core [for dirt cheap], end of story.
-Jo