Does not look good on widescreen. It's TOO wide.
The standard for Menus is on the left. Not the top. Some sites look good along the top even though it's against standard. To be honest, I didn't even notice your menu until I was about to hit the button to post this message.
-Forums should be closer to the bottom of the menu. Putting them first implies that your site has nothing to offer and you are better off getting help from the general public. While this is actually the case with most websites (I can get better computer help on forums.anandtech.com than the main website!), you want people to read your site until your forums take off. BTW, the new "buzzword" for "forums" is now "community".
-Search should be a seperate form box on every page. People look for that box if they can't find what they need right off. If they don't find the box, they keep clicking and get annoyed that they can't find what they need.
The colum on the right needs to be on the left... or much smaller. (Greatly preferred on the left.)
I'm assuming that the "categories" at the bottom are going to end up being nothing more than linked articles? Align them with the body content. Category 4 is under the "news"-like items on the right, and it alienates it from the rest.
Get some brighter colors. What you have no looks decent, but it's very depressing. Throw some flashes of like, a lime green, pale orange, or some golden yellow in or something.
Use icons. People associate with icons very well, and on what will be a text-heavy site, many people don't take the time to read everything but will still get annoyed when they can't find what they need. Keep the text... but... Use like... a bulletin for "Forum Discussion", A Newspaper for "Other News", an Exclamation point for "Tip of the Day".
The name of the site is all wrong. People aren't going to tell their friends "Dude... you have to go check out "Compendium of programming Knowledge". Give it a name and reserve the domain. You can worry about webhosting and such once it gets filled in and gets closer to being big and gets a fanbase. Sucess often lies in sites where the name doesn't necessarily relate to the content. (WTF was an "ebay" before the website gave it the definition? )