We've updated our price-update mechanisms: the biggest two changes are that (a) the request limit has been increased to 200 items and (b) changes are now written to the database.
What does this mean for you? Basically, until now, if one of your lists had more than 20 items from Amazon.com on it, their prices would not automatically update. We saw that this was inconvenient for those of you who had imported your wishlists from Amazon, so after some experimenting and a little tinkering, we found that we could raise the limit to 200. Due to Amazon.com limitations, that's about as high as we can easily go. That said, if this turns out to be too low for you, please let us know and we'll see if we can't get around this limitation. Seriously though, if you have more than 200 items on one of your lists, you should probably divide it up into smaller more manageable lists anyway.
When writing price changes to the database, we do keep track of the original price, so that you can still see any price changes that may have happened. The only difference in functionality is that now after the first time your items' prices have been updated, subsequent visits no longer need to wait for requests to Amazon to come back before seeing the updated prices.