Pam Moran - you need a blend of "fire circle" and "cave" spaces".
keep in mind the need for comfort
instead of chairs for some of the big tables, have benches so that students can climb on them and use in different ways
think about removing shelves from under windows. Could have some window seats or some ledges with space under to store bins or side tables.
Above all, keeping in mind that learning is not separate from their lives.

Writing Activities

on laptops
making visionboards (see Visionboards from SLJ)
scripts, storyboards for digital objects, videos, reader's theater
outside writing - capturing inquiry
questions overheard on playground
questions generated by seasons, pond outings

Reading Activities

quiet and comfortable zones for reading books, magazines, and ebooks
choice in places to listen to individual portable devices which hold audiobooks - small CD players, iPod Touches
comfortable chairs, maybe beanbag chairs -Nicolas

Media Activities

viewing, discussing/evaluating

making videos for fun, for TV morning announcements, for showing learning

P - I - E: present, inform, entertain (LA SOLs include understanding author's purpose and a great way to learn that is to take on the author's role.)
producing mashups, digital collages and videos for content, creativity, and understanding of copyright (have students give their work Creative Commons licence.)

Showing the kind of videos they will never normally see on Nick or the Disney Channel. For example, I Wish

Observation Station

binoculars and bird field guides
things collected on nature walks

Design Activities

display and poster-making
improvising with stuff - not just for Destination Imagination groups : )

Some activities need space

designing things
true of many activities - underlines need for easily configurable spaces

Outside Activities

playground w grass and trees just outside the library
many of the above activities could happen outside w portable furniture (wifi extends fairly far)