We've been hearing (and seeing) more and more about Google's possible wireless service lately, but WSJ published a report this evening indicating that the service's launch may be even sooner than we anticipated.

For those unaware, rumors have been swirling that Google might be ready to open up its own wireless service, an MVNO backed by Sprint and T-Mobile networks, codenamed "Nova."

Tonight's report from the Wall Street Journal suggests Google could be ready to announce the service as early as tomorrow, April 22. Additionally, the report corroborates previous whisperings that Nova would only charge customers for the amount of data they actually use every month, with totals being driven lower by the service's apparent emphasis on using WiFi for voice and data when possible.

Beyond that, the project has done well to keep most of its secrets safe (including whether it will launch first on the Nexus 6) but hopefully we'll hear more (officially) soon.