Short answer... No. All dual socket boards are 940 pin CPUs, and require multi-cpu chips... specifically the opteron 2xx for 2 CPU boards, or 8xx for up to 8 CPU boards.
There's no way to have Athlon 64s/Opteron 1xx run multi-socket because there's only one hypertransport bus. 2xx/8xx chips have 3 hypertransport busses, 1 for cpu to northbridge communication, and 2 for cpu to cpu communication.
Like EdwardN said above, the 1xx Opterons are NOT interchangable with the 2/8xx opterons.
a 1xx is basically identical to the X2 series, just build, and tested to, a higher standard, due to the nature of how they will be used (24/7/365 operation)
Also, Enthusiast Dual CPU (Socket 940) boards are both rare, and expensive, so you'd do best to stick with your 939, unless you want to go nuts with performance. Dont forget, if you go to a Dual-CPU board, you will need to buy some expensive, and not as overclockable ECC ram.
If you want to be able to beat your mates FX60, i suggest you sell both your opterons ( to a friend? ebay? whatever!), and buy yourself an opteron 170. This can, suprisingly, overclock further than the FX60; if you get a "good" chip, due to the way they are made/tested. a 170 is also not too expensive...
Paired with a decent cooler (i'd go for a Zalman, or a waterchill kit from asetek, but its personal choice), you could get some very speedy results.