Very sad news indeed. I unfortunately (and anyone who has seen the footage can certainly agree with that term) saw a bit of Conaway's appearance on Celebrity Rehab - not by choice, but by accident - and I had a feeling the fellow wasn't long for this world. Although the OD reports were wrong, the guy still had a very rough last few years and it's a shame to see it end this way.
I had a feeling that he wasn't going to make it through the week.
Like you, I accidently stumbled upon Celebrity Rehab too. That show is certifiable trainwreck 100 fold. When I first saw Conaway, the only thing that cross my mind was not if he going to die, but when he going to die. I was amazed (and relieved) that he lasted a little bit longer than I thought.
RIP Jeff, aka Bobby Wheeler. I hope you found that peace you've been craving for.