It might be easier for people to tell you if it was worth it if you gave a link, but from what I remember when I start to think about getting my XTi, all the "extras" aren't worth anything. There all cheap knock-offs of real brands.
So it pretty much boils down to $500 for the kit, which from a quick search retails at B&H for $469.95 USD. If I were you I would probably just get the body and ditch the kit lens for 18-55 IS, which from what I hear is a great lens for the price.
If your looking for a really good bargin though, check out the Sell Forum here, I see tons of great deals on XTi's and XT's passing by each week.
Hope that helps a bit, I'm sure someone more noligable will come along, and give some good guidince.