This was a fun email to find in my inbox:
You are scheduled to receive a payment from Bukisa.Unfortunately you have no PayPal account set in your account. Please login and go to your account settings to add the information. Please let us know once this has been done so we may send you your earnings.
I haven't done much with Bukisa. In addition to eHow, I feel like HubPages and Info Barrel are better opportunities at the moment, but all of these sources of residual income do tend to add up!