If you send an email to firstname.lastname@example.org with your .WAV attached, it will convert that .WAV to .MP3. Here’s some more.
send email to:
email@example.com – WAV to MP3
firstname.lastname@example.org – MP3 to WAV
email@example.com – Word, Excel, PowerPoint to PDF
firstname.lastname@example.org – 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. )