Thanks a lot for you podcast, it does a great job.

I want to add one thing to this episode.

When I tried to log into Twitter using my credentials I failed. Digging around the problem resulted in a fact that username and password when authenticating in the Twitter API should both be URL encoded. My login in Twitter is my email so I had problems with @ symbol.

Here’s what can be done here: before urlString declaration in getFriendsTimelineForUsername method we can do the following:
NSString *escapedUsername = (NSString *) CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)username, NULL, (CFStringRef)@”;/?:@&=+$,”, kCFStringEncodingUTF8);
NSString *escapedPassword = (NSString *) CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)password, NULL, (CFStringRef)@”;/?:@&=+$,”, kCFStringEncodingUTF8);

And use these variables instead of the ones we receive in the method. This looks ugly, but nasically the only way – here’s an explanation: http://www.tikirobot.net/wp/2007/01/27/url-encode-in-cocoa/