The bulletin board is up, but the information pages linked from the ".com" home page are still missing. I've been trying to get a registration form for almost a week with no luck.
Due to some problems at the ISP (not at the GSCA), the web page is no longer showing the "links" on the left side. Those "links" are written in Javascript and apparently the Javascript activation has been turned off until the problem is found and remedied.
You can get a GSCA Nationals Registration form from your GSX-tra. You have until April 5 to register at the discounted registration fee of $25 (vs. $50 after April 5).
You can get to the bulletin board (and prolly the other pages) by typing in the proper URL. Use http://www.buickgsca.com/cgi-bin4/yabb/YaBB.cgi to get to the (once again re-colored) bulletin board.
