I noticed the annoying echo today and came here looking to see if anyone else was having the same issue. It is definitely annoying. I hear the other person on the line nice and clear, but as soon as I talk, there is a second voice (not *really* an echo but more like I'm hearing someone else's conversation while I'm talking) and it was very very distracting.
I really hope there is a fix to this problem. BB is wonderful with e-mail, apps and such but first and foremost, I need to be able to use this as a "phone"!