Don't get the hump over my comment... I'm NOT criticising your contribution which is perfectly valid, but think about a $1....

For $1 you can get a PIC with a heap of I/O's...

For an extra $1 added to whatever PIC you are currently using would probably give you a dozen I/O's more

For 75 cents you can get an I2C 8 channel I/O expander...

For 45 cents you can get a PIC10F to give you your extra I/O's...

Adding I/O's at the rate of 50 cents per I/O is nonsensical... there's just so many options available for less money - but...

you've brought it to everyone's attention, and that just might be exactly the product someone is looking for, so thank you for that.