Questions and requests to critique query letters get first priority here on this blog. So if I'm blabbing on about other stuff (ie: there's no italicized question with answer), it means there's no question or query in my que.
I generally post a response to all e-mailed questions/queries within a couple of days. So, if you've sent something and a week has passed and I have not posted a response, assume I didn't get it and resend.
If at some point I become totally inundated with questions and queries, and it's taking me longer than a week to get to them, I will come up with some type of system to let you know your question/query was recieved and when you can expect a posted response.