Seems the main issue was the memory correction. This takes time to roll out to hundreds of thousands of phones, or in the case of a first batch, thousands.

Factor in Nokia is trying to not only make the techs happy, Nokia has to make this device more "consumer friendly" ready for shipment.

Bad impressions would hurt the device and potential deals with Tmo or other potential carriers. If I go by Tmo management chatter (perhaps noise?), Tmo may be waiting on a more phone centric interface to be developed before considering adding the device to their portfolio.

One final and respectful (always) time, techs are the minority of the total population that will buy the N900. A lot of people are planning on replacing their current smart phones with the N900.