I'm going to piggyback on this, if that's ok. I am in the same situation.
Also, would like to add, per a request from Volo, to explain somethings so people don't think I'm ignoring them.
I play at work, and pretty much only from work. At home, I have no choice but dial-up...'nuff said, there. Of course, being at work, I have to ... gasp ... do work on occassion. Frequently, this is at a moment's notice...so I don't even really have time (nor desire) to type in /afk (though I'll usually inform a group, because that's important).
So, if you send me a tell and/or don't see me around much...that's why.