Louis--no problems with my adapters here (I have two of them for my G3 iBook--one for travel, one for home charging). Haven't had any issues with either of them for the 3 years I've owned the iBook (well, technically I swapped out a 500 MHz iBook for a 900 MHz model, but one of the adapters is the same one used for both).
Then again, I'm a very light laptop user, so perhaps my experience doesn't mean much...
Nice site, though! Congrats :)