Brainstorm

When the device is on standby or locked, the screen is completely blank. Other than the notification light, there is no indication of missed calls, messages received etc.

There is a one-size-fits-all call-forwarding/call-divert in N900, there should be seperate options for

1-divert when busy

2-divert unconditional

3-divert when turned-off/unreachable

you can brainstorm it on

http://talk.maemo.org/showthread.php?p=419270

A typical use-case for email clients is to order emails from newest (at the top) to oldest (at the bottom). Modest allows emails to be ordered this way as well. But, if you scroll to an older email (further down the list than the newest email), read an email, and then tap the delete button, the next email that loads is an even older email (i.e., the one that is below the one that was just read). Likewise, tapping the left arrow button in an email View (which users might normally presume would take them "back," actually takes them forward; using the right arrow button, takes them back. This functionality seems backwards (and, therefore, broken).

Listening to music on the N900 is a good experience: system is smart enough to pause playback when a call comes in and restart it once it ends plus there is no need to don the headset since you already have it on.

No such luck with a secondary phone, for example the office mobile: all stopping/starting/changing must be handled manually by the user.

It would be nice to have the N900 act as a switchboard of sorts.

Talk thread here

Typing accentuated characters in Maemo is not the easiest nor the fastest action to perform. This is certainly not a huge issue for english speakers, but it may be for others.

Simple example : we french people love to put accents everywhere, because it's sooo much fun! :p
If you want to type the word "été" (french for summer), you have to type the following sequence :

Fn + Sym + accent + e + t + Fn + Sym + accent + e

That's a lot of keystrokes for a 3-letter word!

As many other languages make use of accentuated characters (i.e. German), improvement in this area would be much welcomed :)