DRUPAL IDEAS
q CCK and Views is a big thing in drupal land right now.
If you at some point need anything else than static pages and issue tracking, you might want to create custom content types for input of data (http://freenacweb.vptt.ch/?q=en/node/add)
q CCK (Content construction kit) allows you to add all kinds of fields to these content types, image uploading, field with email validation, relation building between nodes (this node is a child of another node, in another context than the menus), you name it.... Tons of addon-modules provides these fields with modules
q Views is handy whenever you need some kind of list of nodes. It has a lot of extensions as well. Build you custom news archive, well structured comparison table, rss feeds, google maps mashups, you name it....
q If you want to dig deeper into Drupal, a low barrier way is to watch some screencasts: http://drupal.org/videocasts
This one - introduces you to the power of the CCK / Views concept http://zacker.org/screencast-drupal-mashup-machine
Lullabot also has great articles and a podcast, if you feel like listening to some Drupal talk while working (or driving...) http://www.lullabot.com/
Website design feedback (Tomsun)
I believe it's quite OK. Graphically it lacks a bit of that popular web-2.0-style (bolder colors often in large blocks, large fonts, ajax-style things...) which is not necessarily a disadvantage. The text size might be a bit too tiny for some people. Not sure but the color scheme might benefit from having a third color as contrast to the blue and gray area...
A visitor like me would like even more graphical elements (with a pedagogic style or that marketing "look what we can do, look how good we are" thing) at least for the pages intended for marketing.
Other than that, I think it's quite nice. The zen theme which you have based the theme on is solid and it seems to work alright cross- browser with the changes made to it.