The following data (over the next year or so) can be used to prove or disprove the solar magnetic cycle hypothesis and to determine the relative contribution of CO2 to the 20th century warming. (See comment.)

This is the by month average ocean/land temperature. (This temperature is a composite.)

http://data.giss.nasa.gov/gistemp/graphs/Fig.C.txt

This is a link to a site that provides the ocean surface temperature. The temperatures are updated every 3 to 4 days. As noted, by others the planet’s oceans have recently cooled. The question (need data to answer) is will the oceans continue to cool and if so, by how much.

Compare April 2000 to April 2008.

http://www.osdpd.noaa.gov/PSB/EPS/SST/climo.html

Comments:
1) The solar magnetic cycle appears to be stalled. If the solar magnetic cycle fails to start, then there will be an increase in galactic cosmic rays that strike the earth's atmosphere. In accordance with Svensmark/Tinsley/Yu/Palle’s theory, an increase in GCR will cause an increase in clouds over the oceans which are ion poor. More planetary cloud cover will cool the planet.
2) In the 20th century according to Palle’s satellite and earthshine analysis there was a reduction in planetary cloud cover due to the process electroscavenging. Electroscavenging is the name for the process where high speed solar wind bursts create a space charge in the ionosphere which in turn increases the global electric circuit and removes cloud forming ions.
3) The paleoclimatic record shows a series of gradual warmings similiar to the 20th century warming and also abrupting cooling periods. There is evidence of correlation with solar magnetic cycle changes to the cooling periods but there was no known mechanism as to how a change in the solar magnetic cycle could cause a reduction in planetary temperature.