I use skypeout a bit:
* To dial freephone numbers that UK mobile operators charge through the nose for.
* Cheap calls abroad
* Calling home via wifi when abroad
* When downstairs in my house & I can't get mobile reception

But skypeout can't replace a phone for me until the DTMF tones are fixed. Today I was navigating a callcentre menu on skypeout & had to play DTMF tones over my PC speakers into the N900 mic because the keypad in the phone app did nothing. Ridiculous.