For message Groups i use an App which lets me make Groups named "uContacts" (The problem appears with all other apps, too, where you can create Groups for messaging)
If i manually add Numbers in the Message App there are all green (standard SMS, that´s the way i want to send the Messages), but if i use the Group App, they are all blue, but not everyone of them has iMessage and iOS5!
I don´t want to pick them manually everytime i have to send a group message because i often have to inform them about sth.!
In iOS4 that worked without problems! Thats a bug! Apple has to be informed about that!
I hope you understand my problem!