The best way into bitcoin is to start mining them with you GPU provided it is an AMD 5850 or better.
Been mining them for 2.5 years on my two 5850s and built up to 155 BTC's...
Which were then stolen from the BTC-E.com exchange last night. Due to my own stupidity of not using a strong enough password and enabling a security feature to prevent withdrawal of the coins without email confirmation. But, oh well, back to mining!
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