I was just talking to someone in Moscow from my N900 in an Skype-to-Skype call, a long conversation. Sometimes her voice was dropping out completely or becoming garbled. Fortunately, she was talking a lot so she didn't particularly notice -- she said she was hearing everything I said -- so the problem was only her voice coming to me, it appears.

So, any tips for improving call reception for this? I don't think I was running anything at the same time.

It was pretty great to have Skype on the N900 running so well, as I moved around the house, went downstairs and outside while talking to Moscow.