As the title says, I think having a widget for your email inbox (at least unread emails, but this could be a setting) in a Blackberry-like fashion would be very helpful.

It could be a widget in the form of the calendar widget, maybe each item being clickable and opening the corresponding email inbox or maybe the email item itself.

Features I would like to see:

1. It'd probably be useful to have some sort of sorting option, allowing you to sort the emails in the widget by either date or unread state (or whatever you fancy).
2. A resize option would probably be desirable, I for one would dedicate an entire desktop to this but I'm sure not everyone would.
3. Setting deciding how many emails to show would probably be nice.
4. Maybe a setting to show the first line of the email like the actual client, though this isn't top priority.
5. Some indicator to show what email account it belongs to, but again, not extremely high priority (you'd see this when you'd open the mail anyway).

Brainstorm link.

I think there's one in pr 1.2

Confirmed there is one in PR1.2 but it is not very customisable. This might still be worth a go.

That would be great, though it'd probably be relatively deprived of features looking at other official widgets.

edit: (this was a response to nosa, didn't see casper's post)

This was the biggest disappointment for me with this phone.

I was so used to being able to see my latest unreads emails on the homescreen of my E71 and N97, it seemed ridiculous that nokia didn't continue on and put it on this phone by default.

...they argued "new, better OS - Maemo" (well - we all know by now, there will be an even better one: "MeeGo" - so go away), "it's not Symbian" - and they forgot the people paying their salaries - us - the customer.