I dont know when the downgrader is coming out and to be honest the best thing in these situations is to sit back and wait patiently, this site will post the news as soon as it comes in.
Now a few things to think about before anyone uses a downgrader, one if you brick your PSP its very doubtful that Sony will replace or fix it for free so thats something you have to way up.
Another thing is that no website is to blame if you use the software. Remember no one is forcing you to downgrade if and when it gets released
Finally as a webmaster its a worry if Sony and lets be quite honest here, if Sony find anything that can be used to prosecute sites then im sure they will, in the past they have come down heavy on sites with the Bios of the PSone for download. So for all PSP scene websites you have to be careful. i trust the combined efforts of Team Wab and PSP-Dev but theres always food for thought with any thing you do to a console thats not considered the norm.