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Resources I use to check the credibility of unknown journals:

• Thomson ISI
  • Web of Science
  • http://ip-science.thomsonreuters.com/mjl/publist_sciex.pdf^{Image Added}
• ArnetHarnet?
• Scopus
•  

Hindawi Publishing Corporation

Founded in Cairo in 1997.

22 of the 300 journals have an impact factor between 0 and higher than 0, but below 2.064 (4.096 according to the Hindawai home page)

Some other researchers impressions: http://list.uvm.edu/cgi-bin/wa?A2=MEDLIB-L;wGArog;20110726180255-0700d

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