Here is the stable 0.7.3 release and the mtn builds based on it

Remember: from the release 0.7 on you need Java 1.5 to run I2P, 1.6 preferred!

announce.txt Read the announce text of 0.7.3
i2psource-0.7.3.tar.bz2 sourcecode
i2psource-0.7.3.tar.bz2.sig .sig file for the source
i2pinstall-0.7.3.exe installer
i2pupdate-0.7.3.zip update pacakge
i2pheadless-0.7.3.tar.bz2 installer without GUI

Ans as a tradition, the same day as the release:
0.7.3-1 - Mr. Manfrotto 5kg
The new mtn built is available :-) Have a look on zzz forum entry for a real long list of changes, as UnPnP is built in now.

0.7.3-2 - left alone
Some eye candy with nice flags, you need to get docs.zip. All other changes as always on zzz forum entry 0.7.3-2.

0.7.3-6 - protokollschlampe
Some bugfixes, check all flags on startup, better limits on connections, chinese readme.html added, save and use own geoIP information for ntp servers, ntcp router info send every 90 min instead of 9h, increase min fast peers based on number of local dests
CAREFUL! Path of little flags changed, regrabb the docs.zip and apply the new one if you want to see the flags!
zzz entry 0.6.3-4 and zzz entry 0.6.3-6 for a list of changes.

0.7.3-8 - endless hunger
Small html changes, a new congestion control by mathiasdm and bugfix for OOM.
ZZZ forum entry tells a bit more.

0.7.3-10 - Helter Skelter
Lucky me not building -9 today.
Some general cleanup, connection limiting,UPnP fixes and some CSS.
a href="http://zzz.i2p.xyz/topics/318">ZZZ forum entry shows more detailed information.

0.7.3-11 - Ausschau nerv
Tagged rc by zzz, looks like more or less final mtn til 0.6.4.
ZZZ forum entry tells you more.

0.7.3-15 - Regen Flower
Small changes to enhance network experience.
ZZZ forum will tell you more