Microsoft Windows Small Business Server 2003 will support Terminal Server (in addition to the "remote desktop / administration mode Terminal Services). This was not possible with Small Business Server 2000 due to the fact that it only supported a single server, and you couldn't run Terminal Services in Application Mode on that server since it was also running Exchange, SQL, ISA, etc.
However, according to the ActiveWin article, Small Business Server 2003 will allow you to add an additional server to your network to be used as a Terminal Server. Since Small Business Server is primarily used at small companies with no local IT staff, I think Terminal Services functionality will be a huge advantage. If it were up to me, I'd replace all the desktops in small companies with thin client devices.