It is an amazing news for everyone benefiting the Windows Azure platform! Starting July the first all ingress (inbound) traffic will be free! No time restrictions (off-peak, on-peak), no geographic restrictions, all (inbound) traffic will be free of charge!
The original information source is here: http://blogs.msdn.com/b/windowsazure/archive/2011/06/22/announcing-free-ingress-for-all-windows-azure-customers-starting-july-1st-2011.aspx
Go and enjoy cloud development with Windows Azure!