Colleen -- I just did the math for that as well, assuming a position of 26 N and 80 W (a bit south and east of WPB). Frances is currently about 1013.45km from that location, or 628.34mi. At 14mph, it'd take the storm just under 45 hours to reach the coast, placing it near shore at about 8pm Friday night. Thankfully we have the extra time, however.

(How I calculated: I used the pythagorean theorem to find the direct distance from Frances to the coast in degrees of latitude, then used a quick conversion to kilometers of 1 deg = 11km, then converted to miles using the standard conversion ratio and went from there.)