Should have included the share price in the first post. Added it now.
To buy shares, you need to create an account at glbse.com and deposit BTC. Then use the asset ID FPGA.contract (case sensitive, I believe).
Creating an account at GLBSE is a bit different than most sites. Your browser stores the account information client side, so the password you enter will only serve to keep people out of the account if they have access to your computer. To access your account on a different machine, you will need to export your public and private key and import it on the second machine. I remember seeing a guide on this before but can't seem to find it now.