Update - 11/21/2013
We are still waiting for Forge and MCP to get updated before any mods for 1.7.2 are added.
Here are some details about mods for minecraft 1.7.2.
As with every Minecraft update all mods and modding tools have to be updated to the latest version of minecraft.
Before any mods can be made or updated MCP and Forge have to be updated first. The MCP (Minecraft Coder Pack) is a collection of scripts and tools to help developers create mods for both the Minecraft server and client.
Forge ModLoader (FML)/ Forge use MCP in order to create/update Forge. And finally modders use MCP and Forge to create and update mods. Minecraft 1.7.2 had lots of changes and due to these changes, updating these tools is taking longer than usual.
But have no fear, the tools are being updated and mods will be updated as soon as MCP and Forge are. Meanwhile you can continue to use 1.6.4 to play with the mods.
There is no time frame when the mods will start coming out, the same day that there is a Forge update, I can guarantee some mods will be updated too and they will be added.
So, as soon as mods are available for 1.7.2 they will be added to the site.
We have always been and will be on top of this. We work on adding and updating mod installers every single day. So stick around!