I scored 10 on the GE Watch exam.
I gonna wait till the next f2p hot item apears, the ruby's look are too late to start I think.
I'll be adding new F2P items tomorrow, rubies are still going strong but the crash will be epic when it comes.
Look forward to some new upgrades to the ExchangeWatch infrastructure tomorrow as well, including an easy item tip submit, forum badges, and integration with the actual Grand Exchange graphs and statistics.
A mod edited the thread for me; this sticky is now the official discussion thread for ExchangeWatch items, potential good investing items, investing & merchanting methods, and Rune-Tips.net in general.
The ExchangeWatch item statuses have been updated, new items will be added tomorrow - I received one hot tip that really looks like it's going to take off!

