Super, are you talking about 8 DCS clients at the same time, or one dcs with 7 other users across an ICS connection?
if the later look into setting up QOS? http://www.structuretoobig.com/post/2006/11/07/Setting-Up-Home-QoS.aspx
If the former, is this a one time deal, or do the other 7 pay bills? I'd say either upgrade your level of service, or get a 2nd or 3rd line :D