Yes, you can utilize the email-to-text method to receive text message notifications when you have a voicemail.  Most mobile providers offer email-to-text.  Instead of entering an email address in the notification field, enter your cell phone number, followed by the appropriate mobile vendor domain (see below):

AllTel =

AT&T =

Bell Mobility =

Cingular =

Nextel =

Rogers Wireless =

Sprint =

Telus Mobility =

T-Mobile =

US Cellular =

Verizon =

Virgin Mobile =