Why no invitations after signing up ages ago?

I signed up a couple of times this year but received no invitation.
I'm a Tablet PC user based in Toronto. I was invited to your lab to interview Hyung .... about "ILoveSketch" which I posted to GottabeMobile.com's forums.

I would love to test BumpTop on my Tablet and as well interview you about the software if possible!

Thanks in Advance
Jason Brown
416.203.6923