(this isn't exactly what I want to see on the N900, as it ends up describing more of a companion product, just like my last post did)

Rather than an attachment, I'd like to see something I can leave in my wallet/pocket/backpack/bookbag/briefcase. Something the size of a small cell phone; has its own internal battery with a decent life; a microUSB client port for configuration, wired tethering, and charging; microSD card for storing and transferring config files and wifi keys, and comes in 3 flavors:

a) GSM and GPRS/EDGE/HSDPA/HSUPA/HSOPA/LTE

b) CDMA and 1xRTT/EVDO rev 0/A/B

c) WiMAX/WiBRO


It should support as many of the following local network connection options to the NIT as possible:

1) Bluetooth DUN*
2) Bluetooth PAN**
3) act as a Wifi Access Point with decent security/privacy options
4) SIP server for utilizing any GSM or CDMA voice service that the device has (and can be disabled if the device is being used with a data only plan, or the user just doesn't want to accidentally use voice minutes)

(* unlike my Nokia 2865i, I shouldn't have to always re-approve the bluetooth session: once I've paired them, the device should always accept the NIT, so that I can literally leave the device in my pocket without having to always click "accept" when starting a data session)

(** which the NIT REALLY ought to support, if not in a software upgrade for the N800/N810, then definitely in whatever device comes next)

This accessory could also be sold to non-NIT customers (other PDAs, wifi enabled PMPs, laptops, etc.), and pre-N900 NIT customers.

Call it the Nokia Personal Wireless Gateway (PWG) or Personal Wireless Router (PWR).

I would NOT put in any other bluetooth support (except maybe FTP for handling config files) -- it shouldn't directly connect to bluetooth headsets/handsets ... that should be left to a SIP client on the NIT (or other client device). I also wouldn't put any kind of physical UI on it. You configure/manage it via USB, SD card, and/or HTTPS (once networked to it), and you otherwise never touch it directly ... except to plug it in for charging, maybe.

The only user interface button type stuff I'd put on the device are: status lights for power/charging/low-battery, WWAN connection, USB connection, client connection or data-xmit, and a power button.

When I said "small cell phone", it MUST be no bigger than a cradlepoint mobile router. But, I'd hope for a more candybar shape than the cradepoint (for pocket convenience :-) ).

Last, make sure the GSM version is supported by T-Mobile USA ... and try to convince MetroPCS to support the CDMA version :-)