Having our customers pay by IP won't work well for us.
We'd have to coach customers into entering their username and other bits of data that we need in a special format into the payment message body. It is too prone to user error. I'm sure the IP payment option will work well for others.

Stats update:
Total Number of Payments: 61
Total Value of Payments: $216.12
Estimated Monthly Income: $191.16 (BC46,623.92)
Estimated Daily Income: $6.37 (BC1,553.64)
Average Number of Daily Payments: 1.80
Average Value Per Payment: $3.54
Days since we started accepting Bitcoin: 33