In linux, you can get the following statistics with netstat:
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp4 0 0 192.168.1.136.58519 72.47.210.69.80 LAST_ACK
tcp4 37 0 192.168.1.136.57059 174.129.27.181.443 CLOSE_WAIT
tcp4 37 0 192.168.1.136.57058 174.36.30.66.443 CLOSE_WAIT
But the windows version of netstat doesn't seem to provide Recv-Q/Send-Q. Is there an advanced tool available somewhere, or do I have to talk to some *.dll to get them in Windows?