In the case of bending, I have heard from many people how they struggled to learn, asking advice, trying different techniques, but they end up learning by accident. They bend a note when they aren't trying to, then attempt to remember how they did it. Once you're there, just play around with it until it becomes a part of your playing. I very rarely hear of someone being taught how to bend in a lesson (although, there are the gifted few).

In my opinion, I would stick with harmonicalessons.com. There are a lot of great tips for players at all levels, and these discussion forums are a great way to get some specifics from more advanced players as well as people struggling with the same thing you are. If I were to take more lessons, it would be for the sole reason to have someone to play with. You can always learn from others.

Keep at 'er.

- jim

keep in mind that even if you're taking lessons, you still have to
do most of the work on your own. the teacher is just guiding, not
doing the work for you. also, i figure there are probably teachers
who aren't good at teaching (guy i work with took a private lesson
once and said the instructor spent the whole hour talking about his
personal problems--not a good guy to learn from).

unfortunately, for many, the question is academic. harp instructors
are not like liquor stores-- you ain't gonna find one on every corner.
for folks who have no access to lessons, then absolutely you can learn
a ton on your own using the various books, videos, CD's and of course
this website. however, i believe anyone who has access to a good
instructor would be well served to take at least occasional in-person
lessons.