"Anyone that trys to pin the rise in CO2 on volcanic activity is either uneducated on the issue, or is deliberately lying."

"Present-day carbon dioxide (CO2) emissions from subaerial and submarine volcanoes are uncertain at the present time. Gerlach (1991) estimated a total global release of 3-4 x 10E12 mol/yr from volcanoes. This is a conservative estimate. Man-made (anthropogenic) CO2 emissions overwhelm this estimate by at least 150 times."

So according to this emissions from volcanoes is uncertain.
In 1991 Gerach wrote a paper in which he estimated a quantity that is less than Man-made by 150 times. But someone would have to be uneducated or deliberately lying to say volcano emission was 150 times less than human emission.
As example.
Gerach wrote this:
"CURRENT STATUS: Measurements of the total discharge of carbon dioxide (CO2) gas at the Horseshoe Lake tree kill area range from 50-150 tons per day. Variations are primarily caused by changes in barometric pressure. There is no obvious trend of either increasing or decreasing gas flux at this area; we conclude that the total gas flux coming to the surface at Horseshoe Lake has remained at these relatively high levels since 1996. We do not have enough data from any other gas discharge areas around the mountain to draw conclusions about changes over time at those locations. "
http://lvo.wr.usgs.gov/CO2.html

Some other guys including Gerach wrote:
Invisible CO2 Gas Killing Trees at Mammoth Mountain, California

Since 1980, scientists have monitored geologic unrest in Long Valley Caldera and at adjacent Mammoth Mountain, California. After a persistent swarm of earthquakes beneath Mammoth Mountain in 1989, geologists discovered that large volumes of carbon dioxide (CO2 ) gas were seeping from beneath this volcano. This gas is killing trees on the mountain and also can be a danger to people. The U.S. Geological Survey (USGS) continues to study the CO2 emissions to help protect the public from this invisible potential hazard.
...
Mammoth Mountain, a young volcano in eastern California, sits on the southwest rim of Long Valley Caldera. In 1994, scientists detected high concentrations of CO2 gas in the soil on Mammoth Mountain. This invisible gas, seeping from beneath the volcano, is killing trees on the sides of the mountain and can pose a threat to humans. Recent measurements indicate that the total rate of CO2 gas emission at Mammoth Mountain is close to 300 tons per day. In this photo, large areas of dead and dying trees are visible near Horseshoe Lake, on the southeast flank of Mammoth Mountain."
http://pubs.usgs.gov/fs/fs172-96/

"Airborne detection of diffuse CO2 gas at
Mammoth Mountain, California
...
Airborne surveys of carbon dioxide are much faster (taking 1-2 hours), but there was reason to doubt whether the LI-COR infrared analyzer could detect the diffuse degassing of cold CO2 known to occur in a volcanic area like Mammoth Mountain. An experiment in 1998 to test the capability of the LI-COR, however, clearly demonstrated that low emission rates of CO2 can be measured.
...
The high CO2 concentration shown on the contour map represents an emission rate of about 250 tonnes/day of carbon dioxide."

Now, what does this tell you?
It tells me that prior to 1998 measuring CO2 using Airborne surveys was not done, but since 1998 it was demonstrated as a feasible method to use that broadly measures CO2 emission from a volcanic area. I don't know how many of these airborne survey have been done since 1998 and I don't know how accurate they are, though it seems probable that they are somewhat accurate- but further work in this area will increase the accuracy. It also seems rather labor intensive, so it's probably a good guess that not a lot of this is being done. It also seems likely that this could be measured from satellites- but I don't know if by the year 2007 this has been done yet or if there is any plans to do this in the short term or whether the technology is mature enough to do this in the near term.

The oceans cover 71% of Earth surface and therefore it seems that there are at least as many volcanoes under the ocean as on the surface. There regions which have high volcanic activity- the plate boundary at Atlantic ridge where sea floor is spreading, there is the Rift valley in Africa, Iceland, and Yellowstone area sits on a super volcano. How how CO2 is seeping out of Iceland area or the Yellowstone area? Or how much CO2 is released into the ocean when some island is formed?