If you are using the Nested Set Model to store hierarchical data in SQL, this PHP function will help you convert that data from a flat array into a multi-dimensional array.
This link building technique has been on the block for some time; mainly used by modern web designers and developers to promote themselves and their work. The designers who have some knowledge of SEO have been using the technique to increase the rankings of their clients' sites. My use of the method has shown it to be very effective at targeting not particularly competitive niches without any other link building. I'm talking of the kind of SERP when all your competitors are no more than PR3. This is particularly true if you have your keyword(s) in your company name. There are probably some niches that you could take outright with the technique alone, as many of the sites dispensing the links are high in PageRank â€“ up to PR8 and most being 4+.
Here is another icon set that I made nearly two years ago. I always planned to make over 1,000 of these but never got round to it. There are 310 of them and they are designed to be used on web design projects, but some are also suited to be used as system icons. They are all 16 by 16 pixels, in PNG format and free to use in print and web projects.
Slowly chipping away at getting this site fully online, I've made a number of 48 by 48 icons for use on the front and back-end of the site. I'm releasing them for free use under the Creative Commons (by) licence.