I recently found (and have dismissed) my third - or maybe fourth? - Slovak/Czech tandem partner. I keep thinking, "This time it will work out," but they always cancel the Skype sessions we plan, often last-minute. What gives? Does the internet as a means of making new contacts have the inevitable result that these contacts are flakier and less committed?

Jeez I just want a native speaker to listen to my terrible pronunciation and give me some pointers. Is that too much to ask?