I'm on google apps at the mo with:

1,200 PDF documents
80 spreadsheets
20 documents
Calendar appointments
Contacts
Syncing with Blackberry

Zoho looks far superior but I am concerned with a few issues

Can all my documents be imported to zoho docs, if so, how?
How exactly secure is the system as I keep hearing stories about the amount of fraud in India
Does zoho work with Blackberry?