I planned to wait until the next MeeGo device was released to replace my ancient SideKick2 (yes, 2!), but its microphone died.

I resisted getting the N900 due to the screen size (my eyes are aged and my N800's screen is about the limit of resolution density I can see clearly).
Unfortunately, I'm completely hooked on the power and versatility of the platform and couldn't find an Android I really liked, so I bought an N900 from Amazon last night.
I got it this morning (gotta love Amazon Prime) and tried to see if I could see any wifi networks. I couldn't, but that didn't phase me *too much*, as I what I can see varies at work (we have none in our office, but I can usually see notebooks in add-hoc mode). I know the N800's radio chip is supposed to be one of the most sensitive made, and figured maybe the N900's wasn't as sweet.

So... now I'm home completely surrounded by wifi radiation (I'm 8 feet from my own access point, and with my N800 I can pick up 6-8 at any time).
Unfortunately, the N900 cannot see any wifi network at all.
I even tried entering my SSID (et al) as if it were hidden... no go.

So... I googled, and found that a missing or locked SIM card can cause an N900 to not see wifi (which makes no sense to me, but ok...).
The SIM I'm using came out of my SideKick2.
I haven't yet changed my plan for non-SK data services, but the SIM itself isn't locked (and I'm trying to connect to wifi, not 3G).

For what it's worth, I can make phone calls and receive text messages, so the SIM is working as far as that goes.

I spent the last 2 hours in a chat session with T-Mobile's "support".
The only progress we made (besides testing the limits of my frustration) was to change the SIM code and verify I can lock and unlock it.

I did see an option on the Settings screen "Enter code to remove operator lock", but don't think that's relevant, as I can make phone calls with it.

Edit: Also, I flashed the newest firmware onto the device before I left work.

Any ideas???