This site called ZeroVerteX encodes TWIT and Systm episode into 16kb media files. For example, TWIT episode ten is 27mb for 64kbit and 13mb for 32kbit. The 16kbit version is just around 7mb download. This is very convenient to download these smaller files for my dial-up connection.
If you are on dial-up, go visit the site for the smaller files.