Well... yes. But since you haven't been here since June 4, you wouldn't have many friendships developed.

You kind of have to invest the time, much like in personal relationships. If you're not willing to do that, why bother?

This is a really active and open PLN. Extremely helpful and open to "returnees" like yourself who probably heard about Plurk at a conference

and then forgot about it for... hm, almost a year?

Invest the time, and you will reap the rewards.