These are Eclipse WTP plugins. They should be included automatically if you have the updatesite for WTP added to your eclipse (you might need to expand the updatesite in the ui to get the updatemanager to pick them up)
Confirmed. In Eclipse 3.3, Update Manager will only search update sites which are listed AND EXPANDED. This is a known issue.
Solution, if using Eclipse 3.3 -- expand all sites you will need to search (in particular the Europa & Web Tools sites).
Alternate solution: use Eclipse 3.4.1, where this bug no longer exists, then grab JBoss Tools 3.0.0.CR1.
By the way, if you're not ready to step up to Eclipse 3.4.1, there's an Eclipse 3.3.2 you might want to use instead of 3.3.1, which includes numerous bug fixes.