Popfly Facebook mashup app

Today I stumbled upon the Facebook Popfly mashup app .  I have been playing with Popfly and recently did a flickr mashup .  If you haven’t had a play with Popfly yet, get yourself over to popfly.com and get yourself an account.  They got a whole bunch of community based mashup tools tht you can have great fun mashing up.There are limitations with this app over other Facebook apps like slide.com for example.  You can’t have your mashup actually showing on your Facebook profile, only a link.  My feeling is that Microsoft are still treading cautiously with Popfly as I do get a general feeling of heavy load times when I use it.  Although once loaded, they are very good.  If Popfly is to be taken seriously, or used as a mashup tool of choice and seemlessley integrated into websites, loading times need to improve.