I think that BuddyPress would be the best bet. Here’s my site as an example – http://asgemi.com. Good luck!
I use ClassiPress for my website, BlueGrrl. It’s a theme, and not a plugin. It’s been getting a lot of updates, and seems really promising. Click here to visit ClassiPress website!
I have an Android, and use PostBot. It works great, supports multiple blogs, and you can attach photos as well. Here’s a link to the developers blog – http://nickthecook.wordpress.com/.
Go to http://www.thinkfree.com
They have an online spreadsheet program with a WordPress plugin. Hope this helps. Mark
