I had the LG VX8100 (Verizon Wireless) for about 3 years, and I absolutely loved it. It was intensely hackable (<3 bluetooth + bitpim). Only complaint was that it was insanely obese and battery didn't last very long.
I now upgraded to the Samsung Sway (SCH-U650) and I really like it. It's nice and thin and looks really good too. 2MP camera has really good quality, sound quality rules, and battery life is usually kickass. My only complaint is HOW SLOW IT IS in response time. Like, if i'm texting (or even navigating through menus) it's always like a good 5-10 keystrokes behind me.