Yup - still using my first, operator-supplied N900, which has been my only mobile phone for two and a half years and my only phone full stop for two years (my landline is now routed via SIP).

Admittedly, it's had a preventative USB port fix, a new battery every year, a new stylus and a new set of wired headphones, but the phone itself is still going strong. I have a second one in the drawer which, so far has seen little use, but with SIM-only tariffs getting cheaper and including respectable amounts of mobile data, I'm tempted to put both of them online and carry it as a live backup.

I have yet to upgrade to a 64GB memory card and a decent set of Bluetooth stereo headphones, which would see it get considerably more use as a music player, and am eyeing the notion of a 4G wireless dongle sooner or later. I have to admit that the current generation of 4G mobile hardware is beginning to look tempting, but I had a play with a Galaxy Note II recently and, whilst I like the handwriting recognition and I could cope with it for web browsing, I still don't like Android as compared with Maemo or indeed anything Linux-based. Show me a quad-core, 4G, HD phone that runs Linux and maybe I'll jump ship, but for the next year or two (or five) I'm sticking with the N900. In general, it works pretty well.