If you send an email to email@example.com with your .WAV attached, it will convert that .WAV to .MP3. Here’s some more.
send email to:
firstname.lastname@example.org – WAV to MP3
email@example.com – MP3 to WAV
firstname.lastname@example.org – Word, Excel, PowerPoint to PDF
email@example.com – PDF to Word, Rich Text Format
iPhone@pdfonline.com – Visio, Word (including the 2007/.docx kind) to PDF & supports multiple file attachments.
(Ignore the “iphone” in the address, as it works from any device or computer, but only supports files up to 1 MB in size. )