User blog comment:Mobo85/Phineas and Ferb and JAKKS Pacific Toy Around at NYC Toy Fair/@comment-406459-20100305012946

A collectibles site called Entertainment Earth is showing that the first of these items should be coming out in March. They have some of them available for pre-order:

http://www.entertainmentearth.com/hitlist.asp?theme=Phineas+And+Ferb

Note that while EE offers the plush toys individually, they only offer the figures as they come packaged from the distributor, meaning that you get more than one of each.