When the likes of SEGA want to announce something to the general press, they like most other businesses issue a 'press release'. now that doesn't mean they release some journalists that they've kept hostage for several months- oh no. It's basically a "this is new from us, here's some details, please report on it" document.

Although not exactly 'entertaining' they are a very interesting official resource and hence should be documented for the future. You can find press releases relating to Sonic here: