Great–and as I pointed out earlier and as you have stated, some PCs in fact have USB (power)ports providing more than 500mA of power, potentially making them faster to charge a Clip than a 500mA phone charger. 
If one is going for a charge alone, no need to use a PC USB data port with its lower power rating, if one wants the fastest speed to charge.
Even if comparing a “regular” PC 500mA USB port to a 500mA phone charger, I doubt that there is any significant difference for the average user in the charging time due to the Clip display being on when charging via the PC, especially when one considers that the Clip display turns off after a short period of time, when being charged (I don’t recall if this feature is specific to particular Clip models).
All of this discussion simply to clarify your original comment that phone chargers will charge the Clip player faster than a PC will . . . .
