Just a bump, I've received no updates, and it's currently Aug 16th (Pretty much August 17th). Awaiting 0.25 BTC repayment :O
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Edit: Has not logged on since Aug. 12th?
Damn :-/
Hopefully it's just because it's the weekends or something... I'll give this 24 more hours!
Don't start panicking.. One time I loaned him (he always uses the same address so you can be sure he controls that one) he was also a couple days late and hadn't logged in for several days, this is his normal behaviour.
He simply forgot about it but he will be back and trust me when I say this: he will give you extra interest. (he gave me some too that time)
I would give him another few days/a week just to be safe, I strongly believe he will pay back.