The Developer Portal now offers a new search feature that will allow you to search for the apps in your developer account. If you have more than 20 apps in your developer account, this feature will easily allow you to jump to one of your apps by simply searching for it, rather than navigating through the numerous pages of apps. You can access the search bar directly from the Dashboard page or the My Apps page of the Developer Portal.
Unfortunately, at this time, the search bar does not search through IAP items. However, this is a feature that is under consideration for future updates to the Developer Portal.