PIC-WEB with Microchip’s TCP-IP stack allow development of easy applications for the web. The best thing is that you don’t have to be PIC programmer nor to know C, you can make all your project in html, java script, ajax and you have all PIC resources as dynamic variables so you can toggle GPIOs and read ADC values etc in your html code.
We decided to extend this as PIC-WEB have UEXT connector, now you can access UEXT modules in the same convenient way, as Stanimir developed I2C and UART interface in the Microchip TCP-IP stack.
As you can see from the picture below:
in the web resources you have I2C interface and thus you can send I2C commands to MOD-IO for instance over the web and drive relays ON and OFF, also read I2C sensors attached to UEXT connector.
The same resources for UART are also implemented:
and this way you can interface MOD-LCD4.3 over the internet:
for instance this happens when you send Clear command to the LCD over the web:
so with the new firmware you can have access to all UEXT module resources: relays, sensors, LCDs etc.
olimex 
Jan 21, 2013 @ 15:10:47
Nice stuff to made it YOURSELF. But I think, this complete board is don’t suitable not for development (cuz interface is too heavy for PIC) nor for learning (you don’t need to learn C/PIC ASM).
Jan 21, 2013 @ 15:15:31
the idea is exactly to not use C nor asm, you have now access to all modules just via scripts on the web page which you upload to the board
Jan 25, 2013 @ 18:44:54
Where can I find the new source code in order to update my board?
Jan 25, 2013 @ 18:46:56
http://www.olimex.com
Mar 06, 2013 @ 19:49:03
how to use the connectors???
i am sorry, i may be asking a silly question but i really dont understand that how we would use those closely spaced connectors?