Image Positioning

Hi guys,

Got my blog setup here http://www.0gravity.co.uk/wordpress/index.php but have a few questions about the positioning of the images in the posts.

What I would like

1) If a post has one image then to have the text appear to the right of the image so as to save space and remove the useless white space

2) If a post contains more than one image then to try and move the images side-by-side

Nothing special about how the images were uploaded and added into the page as they are just using a normal img tag.

Any ideas?