[Note by Ed Valentine, 09/04/11 2:12 PM EDT : I see you guys have turned this into a practice squad open thread. Which is cool, since it was intended for that, anyway. Go for it, and keep updating it yourselves with the signings.]
I know there is always confusion about the practice squad rules. SBNation.com recently posted the complete practice squad rules, and it's worth a look if you are not sure how practice squads work.
Here is the essential information:
Eligibility for the practice squad is limited to players who do not have an accrued season in the NFL, or were on an active list (53-man roster) for fewer than nine games during their only accrued seasons. Players that have served two seasons on a practice squad are eligible for a third season only if the team has at least 53 players on its active/inactive list for the duration of that player's employment.
A player will be considered to have served on a practice squad in a season if he were a member of a practice squad for three regular or postseason games during his first two practice squad seasons, or for one regular season or postseason game during a third practice squad season.
The key thing to remember is that if a player has been around for a couple of seasons he is most likely not practice squad eligible. The practice squad is for young, developmental players. Not for guys to make a career out of.