Jabber, you are definitely wrong to state that "$300 pellets blow oil and gas out of the water" - in terms of price.
The basics:
$300 a ton pellets= $6.00 a bag of 40 pounds, or a total of 40x8500BTU= 340,000 BTU for $6.00
Oil at $2.50 a gallon - the same $6.00 would buy approx. 2.3 gallons or 2.3 X 140,000 BTU = 330,000 BTU
Nat. Gas at $1.80 per therm - the $6.00 would buy 3.3 therms or 330,000 BTU
Note that oil prices right now (according to maineoil.com, etc.) can be as low as $2.20 or lower - $2.50 is the upper range.
The gas price given is also high - the page at:
http://www.eia.doe.gov/neic/brochure/oil_gas/natgas06/natgas.html
............states the average price per therm nationwide to be less than $1.10 - yes, it varies greatly but the fact is that Natural Gas blows $300 pellets out the tailpipe in many areas of the country.
Efficiency of ALL modern systems are somewhat similar, although it could be argued that a fixed fuel appliance such as a freestanding gas stove/heater (Rinnai, etc.) as well as a freestanding oil heater (monitor, etc.) is MORE efficient in everyday use. For debates sake, we can say they are all equal.
So, a more accurate statement would be that the total cost of heating with $300 pellets is as high or higher than the cost of fuel oil or natural gas in many parts of the country, and at best EQUAL in others.
This does not consider dust, loading the stove, removing ashes, cleaning out the stove, etc. - Oil and Gas definitely has advantages on those fronts.
While it is my job to promote solid fuels, I feel that accurate information is the best way to do so.