Merry X'Mas & Happy New Year Guys, and Gals too!

Just wondering:
1. Is there an application to send SMSes to a whole 'group' in your contact list without having to select each of the contacts 1 by 1?

2. Related to no. 1, why does my iPhone seem like 'hanging' when sending 20 or more SMSes. Especially when there are messages incoming.
Then suddenly it shows (!) error sending, asks you to try again.
- Problem is, it doesn't show you which recepient(s) got the sms or not. ~_~

3. When it asks you to 'try again', does it send to the whole list again? Or just the failed ones...

Sorry guys. I've asked this before with no answers so I'll try to ask again.

1. Is there an application to send SMSes to a whole 'group' in your contact list without having to select each of the contacts 1 by 1?

2. Related to no. 1, why does my iPhone seem like 'hanging' when sending to 20 or more recepients. Especially when there are messages incoming at the same time.
Then suddenly it shows (!) error sending, asks you to try again.
- Problem is, it doesn't show you which recepient(s) got the sms or not. ~_~

3. When it asks you to 'try again', does it send to the whole list again? Or just the failed ones...

Guys I hate to ask this again, but seems no one replied yet.
Does anyone have any ideas?