I was just wondering what the equation is to find the 555's output frequency is, when a control voltage is applied to pin 5. That would be very useful for me to know!
[Edit By OP]
So based on what Spehro Pefhany said, the equation for the output frequency (Substituting the equations for the high and low times) would be:

Where:
\$V_{Control}\$ is the control voltage
\$C \$ is the timing cap
\$V_{cc}\$ is the supply voltage
\$R_{1}\$ and \$R_{2}\$ are the timing resistors
\$f\$ is the output frequency
