Pulling together what's been stated before in this thread:

• Out of the box, Maemo 5 will only support switching between landscape and portrait for the phone app and for viewing images in, well, the image viewer.
• Out of the box, previous versions of Maemo haven't had universal portrait support either.
• Including universal rotation support in Maemo 5 would have delayed the release of the OS by six to twelve months, which wasn't practical.
• Developers of 3rd party applications can include portrait support if they like, however:
• Nokia hasn't implemented a general-use input method for portrait mode.
• One or more portrait mode keyboards could be created by the community, though anything like auto-word-completion, auto-letter-correction, and the like will make that task more difficult than "Here's a keen layout I whipped up in Photoshop."
• Nokia has hinted that Maemo 6--rumored for release in about a year--will bring universal (or nearly so) screen rotation support.
• Nokia will need to rewrite many of their applications and the system UI for the shift to Qt in Maemo 6 anyway, which may partially explain why they didn't jump on doing so for Maemo 5.
• Nokia has hinted that--due to demand--they may consider working on adding portrait support to some applications later, after Maemo 5 ships. Work on prioritizing which bits are most important is taking place in another thread.
• In the past, the Maemo community has added universal rotation support to previous versions of Maemo through a few different hacks. The result wasn't always pretty or fully usable, but it was popular, and there's no reason to believe there won't be people making it happen again for Maemo 5.

Given all that, would you please break your question down a bit more clearly? It's probably because I'm tired, but I'm unclear on who you want to do more and what you'd like them to do.