I never had the opportunity to use a N900, but I'm still using a N9 as my daily phone (though it doesn't have a slide out keyboard). My older N97 works rather

I never had the opportunity to use a N900, but I'm still using a N9 as my daily phone (though it doesn't have a slide out keyboard). My older N97 works rather well as a SSH terminal using PuTTY for the Symbian OS (S60 version IIRC).