OlleLinge
There are definitely huge differences between learning now and before the advent of smart phones (OCR, handwriting input, pop-up dictionaries). The number of free resources available online is also incredible! I try to contribute and write articles about learning Chinese (thanks for the mention) on http://www.hackingchinese.com
I've also started working on a book. I'll give anyone from HN 10% off once the book is released, just mention HN in the comment when you sign up: http://www.hackingchinese.com/about/hacking-chinese-book-pro...
I think learning Chinese has been interesting at all levels, but for completely different reasons. In the beginning, I thought it was exotic and a bit cool, on the intermediate level, I found it fascinating to be able to start actually communicating with people and on the advanced level I've found that mastering Chinese really is a lifetime project. Naturally, I spend more and more time teaching and writing about Chinese, but I have a lot to learn myself and keep studying as much as I can.