Why are you all obsessed with having so much text in your output file? username : password works just as well. Do you really need it outlined which is the username and which is the password? Rich Mofo:hunter2 - I think I can figure it out. Timestamps are unnecessary. Especially spelled out. If you want stats on the days, just do like 2-3 for February 3rd. They just make it take longer to load the file, and make it a lot harder to create a bot that will automatically test your accounts for you (or otherwise interpret your results file).

user:pass (date)
Flareumb (2-3)
Charles Stover:smart (2-4)
ThirdNoob:hunter2 (2-4)

EZREADS