Up until now, I have used convuluted approaches to get the current user client IP-address.
This weekend I browsed Books Online for SQL Server 2008 R2 (November CTP) and found this new cool function!

SELECT  CONNECTIONPROPERTY('net_transport') AS net_transport,
        CONNECTIONPROPERTY('protocol_type') AS protocol_type,
        CONNECTIONPROPERTY('auth_scheme') AS auth_scheme,
        CONNECTIONPROPERTY('local_net_address') AS local_net_address,
        CONNECTIONPROPERTY('local_tcp_port') AS local_tcp_port,
        CONNECTIONPROPERTY('client_net_address') AS client_net_address<o:p></o:p>

Or this

 

SELECT  *
FROM    sys.dm_exec_connections
WHERE   session_id = @@SPID