Im still finding my way around myself
Unfortunately the change was pretty much needed both for :badword:ure plans aswell as my own sanity's sake.
There are currently 3 main themes to choose from. SMFOne_Blue which is the default theme.
Hi::Ha which is pretty much a polished version of the default SMF theme, and the default theme.
If you come across a theme you like at http://www.simplemachines.org/community/index.php?topic=15620.0
let me know and i will see if it can be added.
On a side note, when the new website finally is ready (im waiting on a third party and have been for some time :\ ) the forum will in all likelyhood recieve a theme makeover to match the site.