Nokia 5900 XpressMusic

No such S60 phone has been announced yet (May 2009), this phone is still just Vapour Ware. Are you really looking for the Nokia 5800 XpressMusic?

However, there are plenty of rumours of follow-up devices to the big selling (1 million a month) Nokia 5800, the likely candidates being a cheaper but similarly specced Nokia 5530 device and a slightly upgraded Nokia 5830 or Nokia 5900:

• PConline - leaked Nokia 5900 images
• Engadget - 5800 upgrade with capacitive screen
• Lovely Chinese 5900 fake - NOKLA 5900-1, flat touch, shake hands change music, multi-languag

Until these rumours are substantiated we can can only speculate as to how likely they are, but the rumoured improvements include the following:

• 5 megapixel camera - 3.2 in the Nokia 5800
• 3.5" display (3.2 in the 5800)
• capacitive touch screen (resistive in the 5800), a capacitive screen could make multi-touch functionality easier to add
• thinner overall design (Nokia 5800 is 15.5mm thick)

All of these sound like plausible improvements to the popular 5800.

There are plenty of other Specific Phones in the S60, Nokia Eseries, and Nokia Nseries ranges, some of which aren't Vapour Ware.