Charles Kelly has posted several freeware AppleScripts for use with iTunes and iPod.

Drag-n-Drop-Text to AIFF 0.01
Drag text files and convert them to AIFF files spoken by MacinTalk.
TextEdit to MP3 0.01
Converts whatever is in TextEdit to an MP3 file spoken by MacinTalk.
TextEdit to AIFF 0.05
Converts whatever is in TextEdit to an AIFF file spoken by MacinTalk.
DJ Track Names to AIFF 0.06
Gives your iPod or iTunes a DJ announcing tunes and artists.