All true, all true. I too am waiting for the app for WM for GV. But GV transcribes a VM like You Mail and does what both Fusion and YM does. Also Google got a little smart and realized that most carriers have "call forwarding" already. I had the calls forwarded from my cell number to GV before GV added the option. And while I am waiting for the app to come out, I can visit the GV mobile website on Opera and works great.
But yeah, its a personal preference thing. I mainly like GV because it is like Skype in that you can do VOIP calls from your comp but you get a phone number without having to pay for it. Serves as a nice business number to put on business cards and such. It's like a second cell phone without having to carry a second phone.