I was an Administrative Assistant in a past life. What you're looking for to do form letters is commonly called "Mail Merge."
OpenOffice.org has a Mail Merge Wizard Native to it's system (I can even point you to the crack to get Merge to Email working). While it may not be instantly usable if you've never done mail merge before, it isn't impossible to figure out.
In OOo, Go to Tools-> Mail merge wizard. You can choose to use the document you're already in, make new, get it from somewhere else... Pretty basic stuff there.
Then it will walk you through the steps till you get to selecting your Data and inserting the fields into your letter.
Whatever you use for your data source, make sure it's in order before you start the merge. Check for correct spellings of names and such.
As another TIP, Use _ instead of spaces in your header row so there you won't Snafu the merge... Maybe it's just my old-school, UNIX mind at work, but I never leave a space to chance.
It's also adds polish to your letters if your data is detailed. Your letters will look better if your 'Name' is broken down to first_name and last_name. That way you can choose just first or last... Think Dear Bill vs Dear Bill Smith.