I just read a message ending by "Sent from my GT-I9000 using VerticalSports.Com App" (in the Australian WC thread).
I would suppose it's the name of the app.
That's it! Thank you! That I would have never found
Petra Kvitova | Sam Stosur | Angelique Kerber | Alizé Cornet | Andrea Petkovic | Michelle Larcher de Brito | Heather Watson | Na Li
Justine Henin | Kim Clijsters | Elena Dementieva | Martina Hingis