Yet another friend metaphor (for twitter)

So I just wasted, er, spent a half hour surfing twitter pages and poaching friends of friends. I noticed that I had a strong gut sense of who I felt it was ok to befriend, most of the time, but that it doesn’t necessarily map to people who are actually my friends or whom I’ve met, although it may factor in how recently I’ve dealt with them.
For some, I added them because I’m interested in what they have to ssay or what they’re doing. I anticipate that their feed will be intereesting, or the preview of their recent thoughts is copmpelling. I’m aware that some of these people may not remember me, may not add me back (which is fine) or allow me to add them if they are twittering privately.
The etiquette is awkward. The UI at twitter sort of implies you should add people back, but that may be just in the contexts of private twitters.
I often notice odd disjunctions between my friend lists or various social services. Some people have talked about being able to bulk upload friend networks using hcards or something from one service to the next, but I wonder if that mapping really makes sense. For whatever reason, for example, Joi Ito is a contact of mine in Flickr but not on LinkedIn. At least one of us probably wants it to be that way.
The whole topics of reciprocity and social guidelines about when it’s ok to ignore a connection or a friend request and when it carries a social burden to do so is interesting too.
This has been another in a series of posts full of questions and half-baked proto-thoughts with few answers or real insights.
Speaking of twitter, I’ve dressed up my sidebar with badge bling. Been thinking hard about seriously redesigning my main blog and possibly moving it over to mediajunkie, which may be the catchiest domain name I own.