Cell phone SMS messaging is planned for an upcoming version, so I will definitely be giving it some thought as to what this might entail and the length of messages sent. If you have any additional ideas or requests I will be glad to receive them.
As for currently, there's no way to change what is sent, but you can choose which feeds are included in email forwarding or digests. A digest would be too much for a cell phone to handle I think so you'd be better off with the forwarding option, which is on a feed-by-feed basis and disabled by default (see the Feed menu).
Could you elaborate on point 2? What additional information would you like included? It's already including the content of the article as determined by the feed.
Thanks for your interest,
Logan
A. Logan Murray
The Little Software Company