I thnk that /connect <server_alias> would be cool.
/connect should be able to use aswell like this: /connect <ip> <port> <pass>
Also, there could be favourite server aliases.
Server_aliases.txt:
[ALIAS_NAME]
IP=server_ip
Port=server_port
and command aliases.
Command_aliases.txt:
/Alias_name = /command
like:
/voteLaos = /votemap ctf_Laos
or
/joinU13CTF = /connect chicago.u13.net 23073
/joinU13DM = /connect chicago.u13.net 23074
/joinU13TM = /connect chicago.u13.net 23076
/joinU13Priv = /connect ted.u13.net 23073
Aliases could be executed as a /command.