I've been looking hard at the N900 as a replacement for my two year-old Blackberry 8330. From a hardware perspective, it's a no-brainer -- but that's to be expected when you're replacing years old hardware.

But from a software perspective, I've combed through the posts about the N900 and here are three important examples where the BlackBerry user experience seems superior to the N900. Maybe some can tell me if I'm missing something:

1. Mail

BlackBerry push mail is tightly integrated with Gmail and Yahoo mail. Mail appears almost instantaneously on my device, and all of my email accounts can appear as one stream, or as separate streams. Deleting mail on the device deletes it on Gmail/Yahoo.

Apparently, Nokia's OviMail is the equivalent of BlackBerry on S60 devices. But, according to this post on Maemo Guru, that's not what will be shipping with the N900. Instead, it's Modest email.

Modest supports IMAP-IDLE ("push"), but does it really work? Can I see all my inboxes in one stream on Modest?

2. Google Maps

Google Maps on BlackBerry look much better than Ovi Maps. I tried Ovi's latest web version and looked at reviews, and it appears that Ovi has nothing like Google's integration between search and navigation. For example, I can search for Thai restaurants near my current location, view the addresses and reviews of the results, call to make reservations, and get directions, all in one application.

Anything beyond simple mapping is an add-on for Ovi, and then the source of the data in Ovi is places like Lonely Planet (at an extra cost) which aren't comprehensive.

Is my take on Ovi Maps way off? Do Symbian users who have Gmaps find that Ovi is just as good? Is "POI" data any good?

3. Device notifications

Blackberry has the ability to have customized notification profiles, which control how each type of communication (SMS, email, phone, IM) rings, vibrates or lights up the device indicator. Blackberry "knows" when it is in a holster (via a magnet) and can change notification profiles depending on whether it is holstered or not.

I haven't seen anything like this for the N900. Have I missed something?

Thanks in advance to anyone with more experience with Nokia or Maemo who can help.