Santa,
I'm unsure how your e-mail received spam, but I can assure you that we don't share user information with anyone, and we take the security of that information very seriously. While my word on the matter will only go so far, no one has access to the user information on the site but BookLamp, and we constantly monitor our system for security issues.
Over the last three years or so that we've been in operation, yours is the second concern raised about someone getting spam to one of their accounts that they had connected to BookLamp. After discussing it with them in detail, we double checked our security, verified all the records of access, and even went to the extent of creating a number of fake accounts with purpose-specific e-mail addresses to see if we could reproduce the issue. We were never able to reproduce the problem, and couldn't find other people that had a similar experience. We queried a number of other users, and found that no one had a similar complaint, that we could tell.
So, while I still can't answer how exactly your e-mail address received spam, aside from the possibility that it was a random shot by a spam bot trying out word combinations, it wasn't us.

Though I can understand your concern about it, and wish I could be more help.
If I may ask, has it been lots of spam, or a limited number? When did the first spam show up compared to when you registered? How frequently are you getting them, and was it an all at once, or did it build? I have read articles that discuss some of the various spamming techniques that are used, and one that I always thought was interesting was to randomly send e-mails to the (word)@domain.com, and watch which do and don't bounce. If it doesn't bounce, it's recorded somewhere as a "real" address and used again later. I have no idea if that's the case here, but perhaps adding a few extra numbers into your naming scheme might help.
booklamp93828@blah.com, or something.
Again, I'm sorry that this has caused you any trouble. If you want, fire me an e-mail at
aaron@cangooglehearme.com with details. In the mean time, we'll check our system again, just to be sure. I'm happy to talk more about it, since I'm sure that... well, if I were a spammer, you'd probably expect me to say what I just said.

But I'm happy to help where I can, if that's useful.
In the mean time, best of luck,
Aaron
P.S. While I have a fairly good knowledge of the systems, Paul is really the guy that knows the most about our security and the technical aspects of what we do. If you keep having troubles, I'll bounce this off of him and see what he might have to add. Thanks again.