We used Allison Barnhill in Annapolis. A lot of ppl use Vista Prints. And, a lot of ppl don't send out Save the Dates at all. The only reason we did so is b/c our wedding falls one day before a holiday and we felt a heads up was needed. In retrospect, we could have just send emails (not as fun or nice, but effective).
We ordered ours from magnetstreet.com and got a great deal using a coupon code. They have a lot of sales and often send out coupon codes for their products. They have coordinating things like invites and thank yous too.
We ordered ours from postcards.com. Not only did they turn out awesome, but we were able to save money by using postcard stamps. They were very inexpensive as well. I paid $30 for 100 of them and they were double sided with a message on the back.
Re: Save the dates
Good luck!
2nd vote for Allison Barnhill in Annapolis. She did a great job on our STD, and I just submitted my order for the invitations (so excited!).
It comes down to the level of DIY you want to contribute, as well as your finances. I was an "anti DIY" type of bride.
But I recommend for both invitations and STDs Paper in the Park in Severna Park.
I also fell in love with a few on magnet street.. my MOH did hers and they looked like a photobooth trio of pics and were a big hit..