A simple google search will show the results you are after.

Warriorforum is by far the best internet marketing forum, but V7N is a great Webmaster forum that has been around awhile.

sitepoint is the best forum for web designers, developers and programmers. and digital point also a good one!!

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Here are some forums I used to be active in during college:

designerstalk - advanced topics on print and web design, whimsical replies all around
estetica-design-forum - not so active lately, but a good place to introduce yourself into the business if you are a noobie
v7n - web development centered
Sitepoint and Digitalpoint also have buzzing communities of reputed members, good places to get feedback and a flow of inspiration.

Sitepoint, stackoverflow, Quora

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Yes, sometimes I like to visit this one:

Web Design Forum | Web Design CSS Design Forum SEO WDF - (Web Design Forum)

Here you can find the best web design forums
smashingmagazine.com/2008/05/01/professional-web-design-forums/

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