I've spent the last 2 hours messing with importing my guest list and getting the right format, font, etc. into Microsoft Word, I think I'm a pro now! Now let's hope I can get them to print directly onto the envelopes correctly!
PS--if you are planning to do this: my biggest tip to you is to create two lists in excel! One list for married couples and singles. Another list for couples with different last names.
The reason being is Microsoft Word does not have an address block format that allows a couple with different last names to be listed as John Smith & Jane Doe without it changing the singles names to "The Smith Family" ---it took my FOREVER to figure this out!!!