Envy is subtly different to jealousy.
Envy is a desire to have what someone else possesses, whereas jealousy is a fear that someone else is taking what is yours.
There's a lot of envy in blogland. Envy that someone else might be having more/kinkier/better sex than you, envy that someone else has more hits, more comments, more awards. Envy that someone else has managed to secure a book deal, envy that someone else has been sent an expensive sex toy to shove up their twat for free.
The sexually wild and abandoned envy the security of the comfortably coupled, while they in turn envy all the pants-moistening passion their hedonistic counterparts claim to be having.
Much reading of blogs is conducted through slightly narrowed, green-tinged eyes. I'm not saying the congratulations when another blogger has a success story to share are not genuine, but there will always be an undercurrent of "you jammy bastard, how did you get a book deal when I am obviously more talented than you?" It's just human nature. We want our peers to do well, but we'd rather they weren't doing better than us.
I suffer from envy as much as the next person. I combat it with my mighty cynicism. If someone else is doing well, I reason, they should enjoy it while they can and I will cheer them on, for it all invariably turns to shit in the end.