Your query on the Google webmaster forum was only posted yesterday - maybe it's a little early to give up on them?
When I run a Google search using your search terms (HTC ChaCha review techworld) I get the htc-chacha-review/ page, which seems to me to be the one that users will want. I can use the tabs for the other pages, and I agree that 'verdict' is the other key tab. No need to worry about lost impressions is there - any who is interested is going to click the other tabs anyway?
You could always try changing the default page to 'overview' and see what happens in the Google returns, but my advice would be to leave things as they are - 'review' is the more important as far as content goes.