I've got one - it is good, but if you let the battery go flat you will loose everthing, including the configuration, that is not on the memory card

MAKE BACKUPS!!
It doesn't seem too clever if you use it for business mail etc. when you use more than one connection to the internet e.g. GPRS for normal, and then a corporate dial up for mails.
Don't get me wrong, it does do it, but just seems a bit complicated.
As Sunny said, screen and camera etc. is good.
Would I recommend it? Yes.
HTH