It can make and receive them. You just can't hear anything. Then again, do you really want to?
I mean I hardly use my phone features at all, texting, emailing, etc. Quicker to just say "hey, we on for some LAN?" Then to have to actually talk to someone and ask how they're doing, etc.
Besides, saying that Android has Opera and Firefox isn't a plus over Maemo anyhow, since they are also on Maemo.
I recently bought an Android tablet, and besides the fact that NITDroid runs better on my non-overclocked N900, I would say 90% of all the Android apps are duplicates of other Apps and the other 10% are just plain garbage.
How about Android's complete lack of running any of the gnu utilities without rooting?
What about being able to multi-task without having a third party app?
Or even with a third party App, multitasking on the Android platform is like being punched in the face. Irritates the hell out of me.
Oh, and I recently discovered 'cause of only having a tablet without 3G, that there currently is no Offline Google Maps.
That is definitely one thing Nokia did right (even if the N900's version of OviMaps is missing voice activation by default)