Invite to wedding reception...gift or no gift?

I just received an invitation to a wedding reception. This has happened to me one time before - being invited to the reception but not the wedding. The only problem I have is if I should bring a wedding gift for the bride and groom for the reception or not. Honestly I'm glad to be invited...but if you can't even consider me to be witness your wedding, why should I bring a gift to the reception? Viewpoints and suggestions are greatly appreciated!
To clarify my question, let me be clear: I'm not bitter or miserable about attending. Before you draw to any conclusions, you have to know the entire story - like my Friend who is getting married for the second time, having only invited me to the reception then, and doing this the second time after I brought the subject up only months ago. So yes, I'm a little surprised, but not bitter, miserable or losing sleep over the entire thing. I just wanted advise on the gift situation - that's it. This is not the kind of couple that is starting fresh, so they need certain things to begin their lives together, they are a couple that have lived together for the last three years. I thank you all for your comments, especially the colorful 'you should stay at home' remarks...I got a good laugh out of it. :)