Hmm, I didn't yet. Where can I sign up for Home and Warhawk...?

 The warhawk beta ended... so you'll have to wait for the full retail version at the end of august.
as for home.... i don't know. There may have been oppurtunities at the PSN homepage, Playstation underground emails, emails from Sony in general, or links giving from playstion themed forums.

 Just join the playstation underground on the playstation site and register your PS3. After that you can get into the game advisory panel later, there used to be a Home Beta sign up site but it doesn't update often: 

Dang. Foiled again. I have no Home...

I hear ya on those Hong Kong and Japanese games/demos that we don't get. I did manage to play through the Japanese demo of Fouksoul and I'm looking forward to playing that because of the unique gameplay, despite not being able to understand the story that was unfolding in the demo.

I got a few unique demos from the UK as well.

Edit:  Btw, this Nucleus game did not need to be released anywhere near Super Stardust HD.  It's not nearly as good from reviews.  The demo was terrible. 

 Argh... they don't accept pal systems...

I want into the beta. Somebody on my PSN friends list got in and that upset me. Oh well, I believe it comes out in October?

Hmmm, so I wonder what the chances would be for someone who has been a member of the PS underground and G.A.P. since 2002 and frequently gets PSP demos? Then again, I just got the PS3 last week, so who knows when I'll get a shot at getting into the beta.