There's a mycorrizhae mix out there called "Rick's Monster Grow" that is getting some very positive reviews. Apparently Rick's has 56 mushroom spores in it (compared to 20 something for Great white as an example), and it's supposed to germinate within 28-32 hours (compared to many spores which could take up to a year).
If you have questions, apparently Rick answers the phone himself. Here's a link:
http://monstergrow.tv/index.html
Many on the board here use similar products. Anyone tried this one? Any feedback to report?