If you're not doing graphically intensive tasks, don't need the extra screen real-estate and want something a little smaller, the MacBook will be fine. Option it with 2GB of RAM and it will make an excellent web- & photo- box.
Unless you're doing a lot of heavy-duty Photo or Video work (Photoshop/Final Cut), the regular MacBook will suit your needs just fine -- as was suggested, spend some of the money you save on memory, but not from Apple -- check www.DealRAM.com for the best prices (OWC offers rebates if you trade-in your OEM memory on an upgrade).
Actually, the MB is fine for those too. If you're heavily using an app in editing like Motion, then a MBP would be a better purchase, although it is do-able with a MB.
But it's a bit of moot point, as given what the OP stated his needs were, he's unlikely to be doing this.
😕 The powerbooks in the refurb store all cost more than a new MB (at least every time I've looked at them). And if you compare them to a refurb macbook, then the difference is even larger.