Additions
It should also be pointed out that, unlike some of the more expensive models (N93(i), N95), it doesn't have hardware 3D acceleration, which would be pretty much welcome on a gaming handheld.
Second, you state "it has a UPnP media streaming facility for transmitting tracks to a compatible hi-fi." UPnP is able to do a lot more - for example, streaming to YOUR handset from a UPnP-enabled NAS, which is the most widely used usage area of UPnP.