I don't know if you already know this or not, but I found this recently on F-22 block numbers....
The Block 10 Initial Operational Capability configuration, to be fielded this year, will be multirole, with the option of four AMRAAMs being replaced by GBU-32 JDAMs. This provides an analogous deep-strike capability to the F-117A, but is more survivable.
The Block 20 configuration is the baseline for the Global Strike Task Force (GSTF) fleet, and will include JSF common radar modules, a dedicated high-speed radar processor, and COTS technology CIP processors. The GBU-39/40 Small Diameter Bomb is introduced in the Block 20 aircraft by 2007, together with high resolution SAR radar modes, improved radar ECCM, two way voice and data MIDS/Link-16 capability, improved crew station software, and improved electronic countermeasures. The Block 20 provides a robust ground attack capability using the GPS duided Joint Direct Attack Munition (JDAM)
The Block 30 configuration, planned for 2008-2011, extends the growth seen in the Block 20. Side-looking radar arrays provide a significant ISR capability in the aircraft along with enhancements to provide full Wild Weasel air defence suppression and time-critical target engagement capabilities. A Satcom terminal will provide continuous network connectivity during deep-strike profiles. This will include the addition of the APG-77(V)1 radar adding ATG radar mode to the existing Block 20 model. The new radar enables the Block 30 to generate Synthetic Aperature Radar (SAR) maps to self-identify ground targets and employ precision munitionsagainst those targets. In addition, Block 30 aircraft will add a new ground attack weapon: the Small Diameter Bomb (SDB). A Block 30 configured F-22 can carry eight SDB's.
Block 35 aircraft will will have all the capabilities of Block 30 and add two new air-to-air missles and an advanced tactical datalink. The AIM-9X is an improved IR missle with much improved infrared seeker sensitivity and greatly enhanced post-launch agility. The AIM-120D is the Department of Defence's most advanced medium-range radar-guided missle and is currently in development. The new datalink will provide improved interoperability with theatre aircraft and enhanced situational awarness.
The post-2011 Block 40 aircraft is intended to be the definitive Global Strike configuration, with incremental enhancements to Block 30 additions providing full sensor networking, range enhancements, integrated ISR capabilities, and a Helmet Mounted Display similar to the JSF.
Longer term planning for a Block 50 envisages an Electronic Attack variant, replacing the lost EF-111A Raven. A stealthy stores pod for JDAM and SDB is under development to enable carriage on external pylons. As a strike aircraft the F/A-22A will have similar internal payloads to the JSF, but will be vastly more survivable due to better stealth.