It seems that people really do want Dark Souls to gain a PC release. Developers Namco Bandai hinted that if there was strong enough demand for a PC version, then the super-tough Dark Souls may get a PC release.
So fans went about launching a petition, which has gained an impressive 66,000 signatures in just one week-something which has definitely caught Namco Bandai's attention. Whilst a PC version may not be on the cards as of yet, the petition seems promising enough.
You can still sign the petition here.