Valtteri Halla, the Nokia member of the MeeGo Technical Steering Group, announced at the beginning of the month that Nokia and Intel plan to open the MeeGo repository by the end of this month.
One of the most interesting points in the blog post was that the source and binary repository will provide builds of MeeGo on Intel ATOM netbooks, and the Nokia N900 (ARM).
This means that even if there is no official MeeGo release provided to N900 users from Nokia, it will certainly be possible to install a development-grade copy on the device. I even have hopes that there might be a community maintained version if no official release emerges.
More information: Ars Technica, Engadget.