Help with Mercury compatibility! I'm worried?

Mercury IS very important in a relationship, and it's smart of you to look at that specific placement. Almost any other problem in the natal chart can be cured by a decent Mercury synastry, because, lets face if, if you understand each other mentally, you're likely to work through problems better.

Virgo and Pisces being opposites really isn't such a terrible thing, and it's certainly not a deal breaker...opposites often understand each other just as well as conjuncts. But you really need to look at the other aspects to mercury to understand the big picture.

So, that said, there's a good website where you can calculate a basic synastry (the interaction between two charts) and that is http://www.astro-software.com./ If you have the times of birth also, you can get a more indept analysis at http://www.astro.com,/ which is a quite excellent site for such things. Both sights are free and I consider them rather accurate for a basic chart. If you want more specific information about aspects between you, just come back and post your specific questions. It's way way too hard and long to try to do a full analysis online like this....that's several hours or even days worth of work to an astrologer!