Here's a few more updated anecdotes from me.
I visited my local EB and Zellers on friday. Zellers was sold out of the last of their PSPs hardware, and they had shuffled some other product over to fill it's empty space (they still had a small section for PSP games). In EB, there was a bit of a scene, as someone who bought a launch day PSP was trying to return/exchange it because of dead pixels. The store was telling him "no", and he wasn't going to take "no" for an answer.
The manager had come out and was trying to get him to lower his voice. She was telling him "Look, I can take you into the back room and show you the email we got from Sony, telling us not to take back any PSPs that have dead pixels, because they aren't gonna give us a dime for them. Maybe if you had more than 14 dead pixels then we could help you, but as-is, Sony doesn't think that four of five dead pixels is going to interfere with your games."
The guy started saying "If I had gotten it from Future Shop instead of you, I bet I would've been able to return it." The manager took out her wallet and said "If I take that unit from you, I might as well just hand you $300 (Canadian) from my own wallet, because that unit's not gonna do me any good. I'm not going to do that. Maybe someone at Future Shop might do that for you, but I won't."
Then they guy started saying that he wanted the guy who was working the register on launch day to be fired, because he wasn't warning people, but the manager said that was ridiculous, and absolutely out of the question.
The guy eventually left, saying that he was never going to shop at EB again.
Someone came in a bit later, thinking about buying a PSP. They told him that it comes with Spiderman 2, which tells me that they're still working on selling their launch units. One clerk told the guy that it plays mp3s and DVD movies. They guy said "Whoa! It plays DVDs too?!?" The other clerk popped in with "Well, not exactly. Not ordinary DVDs. They have to be mini discs, otherwidse they wouldn't fit." The guy said "What? Minidisc? I have those. For my car stereo. They're great. I didn't think anyone else even knew what they were." To which the clerk had to respond "No, not 'Minidisc' mini disc. It's 'UMD'. Made by Sony." To which they guy said "Yeah, all my Minidiscs are made by Sony." The clerk said "No no, it's not the same thing. Sony decided to make an all-new format. Again. It doesn't work with anything else. Just the PSP." To which the guy said "Oh. Well that sucks."
Yesterday I went out to New Westminster (a suburb) and checked out another EB, a WalMart, and a Best Buy.
In EB, while looking over their games, I noticed that they had two PSP units in the glass cabinet behind the cashiers. Someone came up and asked if they had any PSP units left, and they said "Wow, your timing is great. I think we have ONE unit left. It's in the back of the store. I'll go get it." He went off, and he came back, saying "Yep, this is the last one that we have in stock." Meanwhile I'm just staring at the two behind the counter...
Over in WalMart they has around 20 PSP units in their videogame cabinet. Over in Best Buy, they must have had at least 50 units in a white-metal locking cage.