Hi gp792
An announcement was made in February requesting applications for people interested in beta testing. This closed a few weeks later, and beta testers were selected from the applicants.
As the beta for TS2010 is a closed beta, pre-ordering TS2010 will not get you access to the beta. This only applied to TS2009, which was an 'open' beta.
Please remember that, if you were to become a beta tester, you would be required to sign a non disclosure agreement. This generally means that you would need to be over 18 years of age to become a beta tester. It also means if you are a beta tester, you would not be able to reveal any information about what you are testing.