This new feature was released a couple of days ago, but here is the official announcement.

A new feature has been added to the ChipGuide. The new feature is an enhancement to My Collection with the addition of Top 10 lists. This allows ChipGuide members to maintain a Top 10 list of their favorite ChipGuide items. I discussed this with Jim Follis, who currently does Top 10 lists for collectors on his own, and he was all for moving this function to the ChipGuide where it can be dynamic and where we can gather statistics.

It works in the same way that My Collection, Trade List and Want List work. There is now a 4th button, TT ( for TOP TEN). RED means it is NOT on your Top 10 list and GREEN means it is. Pressing the button changes the status. Just find an item on the ChipGuide that you want to put on your Top 10 list and press the RED TT button. Repeat 9 more times. Finished. Note ... if you already have 10 items on your Top 10 list, you will not be able to add another one until one item currently on the list is removed. You can have multiple Top 10 lists, one for each of your favorite collectible type.