> Is it still money laundering now that the IRS has said that Bitcoin is property and not currency?

Since that was an interpretation of categories in tax law, which are completely different than those applicable to money laundering, the IRS determination on how bitcoin is taxes probably has no bearing on any analysis of how money laundering laws apply.

Yes. The IRS and FinCEN are sister agencies, so the pronouncements of one agency have little effect on the other. In this case, for IRS (i.e., tax) purposes, bitcoin is property. For FinCEN purposes, bitcoin is a "virtual currency" which results in many but not all of the same rules that apply to persons dealing in real currencies.