We've decided to accept sponsorships of phpMyAdmin in more official way. So if you or your company want to financially support this software, you now have great chance to do that.
Time to time we've received offers for sponsoring, but we never got to point where we could easily handle these. In the past we were limited by sf.net requirements for no advertisement on website, but it got leveraged over the time and we did not change our policy much.
For now the only benefit we are providing to our sponsors (besides good feeling that they are supporting good project) is logo and link on our website. In the future we might add some more, but at first we want to see how it works in this scale.
Anyway if you are interested in sponsoring phpMyAdmin, you can do that on our website.