A wedding announcement should read along the lines of:
Jane Anne Smith
and
Jason Andrew Jones
were married/were united in holy matrimony
Saturday, the seventh of March
two thousand fifteen
Boston, Massachusetts
The new Mr. and Mrs. Jones will reside at 123 Main Street, Boston, MA.
There is absolutely no polite way to "let people know stuff [you] still need." First off, it's incredibly tacky to include your registry information on the actual wedding invitation to the actual invited wedding guests. And second, it's incredibly tacky to remind people that they weren't invited to your wedding but you'd still like them to send you a gift.
If someone has volunteered to throw you a bridal shower, then she will pass the registry info along to your guests. If someone wants to know where you are registered or what you want, then she'll ask your parents or bridesmaids. If someone directly asks you about a registry or what you'd like, you are allowed to respond, "We have a registry set up at Macy's" or "We don't really need anything. We're just saving up to buy a new house" followed by, "You're so kind to think of us!" and then quickly change the subject. And if nobody asks, then you keep your mouth shut about gifts.
There is NO polite way to solicit gifts for yourself. NONE. Your wedding guests do not owe you any gifts, and non-invited friends certainly don't owe you anything, either. If you "need" stuff for your marital home, then save your money or get a second job and buy it for yourselves. As far as gifts, you just sit back and see what happens ... if you get gifts, then you promptly send out handwritten than you notes. If you don't get gifts, then you say and do nothing. You don't suggest to your guests that they buy it for you.
Soliciting gifts is indeed tacky, rude, uncouth.