Broom corn is a type of sorghum, specifically sorghum vulgare, I am
trying to find a source where I can order this by the pound.  So far
all I've found is places that will sell packets of seeds.  Ordering
online or by phone is acceptable.  Thanks

Thanks for asking!

The following sites sell one or more varieties of Broomcorn online, by
the pound or kilogram:

Next Harvest
Grain, Sorghums and Ornamental Corn Seeds 
Prices $15 lb - $24 / 1/4 lb.
http://www.nextharvest.com/grain.htm


National Broomcorn Company (Amex International)
http://www.broomcorn.com/
Contact Info & Pricing
http://www.broomcorn.com/passlock.htm


Outside Pride
Sorghum Vulgare sold as Sudan Grass $9.99 / 5 lb.
http://www.outsidepride.com/sorghum.asp


B&T World Seeds
Sorghum vulgare technicum (many varieties)
Metric and currency converters available
http://www.b-and-t-world-seeds.com/a1.asp?title=Grasses+Gramineae&list=145
Price Codes
http://www.b-and-t-world-seeds.com/price-codes.html


Google Search Terms:
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Sorghum vulgare technicum seeds lb.


Hope this helps, 

---larre