Update August 11, 2019: Below follows an older post in which directory owners were helping each other by adding directories to their del.icio.us  account. This is long past, no longer something people do, but you can read about still below…

del.icio.us has become an important resource that seems to be heavily spidered by search engines and improves “page strength” as defined by moz.com. I would like for people to start to work together and add each others directories to del.icio.us. If you haven’t already done so, please go and create an account on del.icio.us.

Then please do the following:
1) Add phplinkdirectory.com to del.icio.us
2) List the site you would like others to add to del.icio.us (only 1 per person please)
3) Look through this thread and add the sites that people requested 
4) Check back about once per week and add some more

I think it will be great if we can work together. It will help all of us.