Skepticism And Practical Reality

One attack on skepticism is that one has to be skeptical of skepticism, and skeptical of being skeptical of skepticism, and skeptical of being skeptical of being skeptical ....- into an infinite regression.  Is this a valid argument? Ironchariots.org, the counter-apologetics wiki, has an entry that clarifies skepticism and supports it as a valid practical tool to arrive at the truth.  This blogger challenges anyone to posit a tool better than skepticism to determine reality.