I am Authorised dealer of Pak Suzuki. For your information there is no such notice of discontinuation of Mehran or any other model.
YES, upgradations are coming soon(weeks,month or 2008). Alto and mehran will come to Euro2 versions (EFI technology).
Cultus has already been upgraded and now it goes upto 170km/h on motorway. Before it hardly crossed 120km/h.
This all is being done for the consumer benefits.