A (semi incomplete) list of things currently implemented/unimplemented. will definitely be adding additions.

General:

Server Operators
Server Bans
Server Kicks
TLS
Ping everyone after a certain amount of time and kick those that haven't responded by the next ping
Scan and delete/warn inactive channels
Save current server details (channels, banlists, etc)
Load server details previously saved on server restart
Setup.py
Logging
MOTD
Server Title
Server Welcome
Server Description
Configuration file
ISUPPORT
CAP
CTCPs
Server OP alerts
Server monitoring console/command for ops
^On that note, have a module, irc_console, with neat formatting things for printing to the console.
NickServ/CrowBot (maybe)
Store things in a database and not a text file...
Set modes on user when they connect. Get the modes to use from the config file.

Channels:

Owners
Expiration
Operators
Change/Set/Lookup Modes
Invites
Deletion (Deletion works by expiration - still need to let owners delete their own channel)
Anti-Spam (to be a mode)
Topics
Bans
Kicks
Mutes
Hash Owner + Oper passwords instead of using plaintext
NOOPERHOST
Sub-Channels (might be a dumb idea)
Change Channel Name Command for owners
Co-Owners

Join channels
Change nicknames
Random Nick Generation after 3 failed nick change attempts during initial connection
Message Channels + Users
Nickname Registering
Max registered nicks
Change/Set/Lookup Modes
Leave/Disconnect
Leave/Disconnect Messages
WHO
WHOIS
WHOWAS
MaxUsernameLength
MaxNicknameLength
MaxClients
If user is a server operator, add a * next to their nick in WHOIS/WHO
If a user is a channel operator, add an @ next to their nick in WHOIS/WHO