1. Comments are useless these days. 90% of them are spam, and even if they’re not spam (outright), they’re crafted so as not to look like spam.
2. Managing comments (bunk or legit) is still as painful as it ever was.
3. Sometimes, I don’t want someone to know I came to their site. Now, I’m not saying that I’m visiting the “wrong” kinds of sites – just that, jeez… you never know when this feature is going to turn around and bite someone in the ass.
4. It still hasn’t updated the screen shot for my blog, and I’m (admittedly) too lazy to upload my own.
5. In the beginning, it really helped bLaugh’s traffic – but now, I don’t think it’s half as useful for bringing new visitors (or known supporters) to any one of the sites I have MyBlogLog code running on. Odd that a social network would be *MORE* effective with *LESS* users.
6. It’s easy to spot the marketers and SEMs – they’re the ones with hot chicks for buddy icons. I guess that’s not so much a “problem” (per se), but it does speak well to my point that MyBlogLog is becoming increasingly useless for me.

Still, I use it – but every one of the aforementioned points will keep me from ever upgrading to a “Pro” account. Not to mention, now that Yahoo owns ‘em – things will change with MyBlogLog sooner or later.